Efficient formation of nitriles in the vapor-phase catalytic dehydration of aldoximes

Efficient formation of nitriles in the vapor-phase catalytic dehydration of aldoximes

Green Chem., 2016, Advance Article
DOI: 10.1039/C6GC00384B, Paper

Daolai Sun, Eisyun Kitamura, Yasuhiro Yamada, Satoshi Sato
Nitriles were efficiently produced in a vapor-phase dehydration of aldoximes over SiO₂ catalysts without external heat supply.

http://pubs.rsc.org/en/Content/ArticleLanding/2016/GC/C6GC00384B?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2FGC+%28RSC+-+Green+Chem.+latest+articles%29#!divAbstract

 

A vapor-phase dehydration of acetaldoxime to acetonitrile was investigated over various solid catalysts. Among the tested catalysts, ZrO₂, Al₂O₃ and SiO₂ showed high catalytic activity for the formation of acetonitrile from acetaldoxime, while the correlation between catalytic activity and the acid property of the catalysts was not observed. Weak acidic sites such as silanols sufficiently work as catalytic sites for the dehydration, which does not require strong acids such as zeolites. Several SiO₂ catalysts with different physical properties were tested, and the SiO₂with the smallest pore size and the highest specific surface area showed the highest catalytic activity for the formation of acetonitrile. Because the dehydration of acetaldoxime to acetonitrile is exothermic, a large amount of reaction heat was generated during the reaction, and the reaction temperature was found to be significantly affected by the feed rate of the reactant and the flow rate of the carrier gas. In order to effectively utilize the in situ generated reaction heat, the dehydration of acetaldoxime to acetonitrile without using the external heat supply was conducted. The temperature was controllable even in the absence of the external heat, and the acetonitrile yield higher than 90% could be achieved in such a green operation under the environment-friendly adiabatic conditions.

 

 

Efficient formation of nitriles in the vapor-phase catalytic dehydration of aldoximes

Daolai Sun,^a   Eisyun Kitamura,^a   Yasuhiro Yamada^a and  Satoshi Sato*^a  

*Corresponding authors

^aGraduate School of Engineering, Chiba University, Chiba, Japan
E-mail: satoshi@faculty.chiba-u.jp
Fax: +81 43 290 3401
Tel: +81 43 290 3377

Green Chem., 2016, Advance Article

DOI: 10.1039/C6GC00384B

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Nanopalladium-catalyzed conjugate reduction of Michael acceptors - application in flow

Nanopalladium-catalyzed conjugate reduction of Michael acceptors - application in flow

 

Green Chem., 2016, Advance Article
DOI: 10.1039/C5GC02920A, Communication

Anuja Nagendiran, Henrik Sorensen, Magnus J. Johansson, Cheuk-Wai Tai, Jan-E. Backvall
A continuous-flow approach towards the selective nanopalladium-catalyzed hydrogenation of the olefinic bond in various Michael acceptors, which could lead to a greener and more sustainable process, has been developed.

 

A continuous-flow approach towards the selective nanopalladium-catalyzed hydrogenation of the olefinic bond in various Michael acceptors, which could lead to a greener and more sustainable process, has been developed. The nanopalladium is supported on aminofunctionalized mesocellular foam. Both aromatic and aliphatic substrates, covering a variation of functional groups such as acids, aldehydes, esters, ketones, and nitriles were selectively hydrogenated in high to excellent yields using two different flow-devices (H-Cube® and Vapourtec). The catalyst was able to hydrogenate cinnamaldehyde continuously for 24 h (in total hydrogenating 19 g cinnanmaldehyde using 70 mg of catalyst in the H-cube®) without showing any significant decrease in activity or selectivity. Furthermore, the metal leaching of the catalyst was found to be very low (ppb amounts) in the two flow devices

 

 

3 Gottlieb, H. E.; Kotlyar, V; Nudelman, A. J. Org. Chem. 1997, 62, 7512-7515.

 

 

Nanopalladium-catalyzed conjugate reduction of Michael acceptors – application in flow

Anuja Nagendiran,^ab   Henrik Sörensen,^bc  Magnus J. Johansson,^bc   Cheuk-Wai Tai^d and  Jan-E. Bäckvall*^ab  

*Corresponding authors

^aDepartment of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
E-mail: jeb@organ.su.se

^bBerzelii Centre EXSELENT on Porous Materials, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden

^cAstraZeneca R&D, Innovative Medicines, Cardiovascular and Metabolic Disorders, Medicinal Chemistry, Pepparedsleden 1, SE-431 83 Mölndal, Sweden

^dDepartment of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91, Stockholm, Sweden

Green Chem., 2016, Advance Article

DOI: 10.1039/C5GC02920A

http://pubs.rsc.org/en/Content/ArticleLanding/2016/GC/C5GC02920A?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2FGC+%28RSC+-+Green+Chem.+latest+articles%29#!divAbstract

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Catalyst-free thiolation of indoles with sulfonyl hydrazides for the synthesis of 3-sulfenylindoles in water

 

Catalyst-free thiolation of indoles with sulfonyl hydrazides for the synthesis of 3-sulfenylindoles in water

Green Chem., 2016, Advance Article
DOI: 10.1039/C6GC00313C, Communication

Yu Yang, Sheng Zhang, Lin Tang, Yanbin Hu, Zhenggen Zha, Zhiyong Wang
A water promoted thiolation of indoles with sulfonyl hydrazides has been developed under mild conditions in water.

http://pubs.rsc.org/en/Content/ArticleLanding/2016/GC/C6GC00313C?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2FGC+%28RSC+-+Green+Chem.+latest+articles%29#!divAbstract

 

A catalyst-free thiolation of indoles with sulfonyl hydrazides was efficiently developed in water under mild conditions without any ligand or additive. The reaction provided a variety of 3-sulfenylindoles with good to excellent yields and the only by-products were nitrogen and water.

 

[1] F.-L. Yang, X.-T. Ma and S.-K. Tian, Chem. Eur. J., 2012, 18, 1582

 

 

 

 

 

Catalyst-free thiolation of indoles with sulfonyl hydrazides for the synthesis of 3-sulfenylindoles in water

Yu Yang,^a   Sheng Zhang,^a   Lin Tang,^a   Yanbin Hu,^a  Zhenggen Zha^a and   Zhiyong Wang*^a  

 

*Corresponding authors

^aHefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei, P. R. China
E-mail: zwang3@ustc.edu.cn
Fax: (+86) 551-360-3185

Green Chem., 2016, Advance Article

DOI: 10.1039/C6GC00313C

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Pd(II) pincer type complex catalyzed tandem C-H and N-H activation of acetanilide in aqueous media: a concise access to functionalized carbazoles in a single step

 

 

Pd(II) pincer type complex catalyzed tandem C-H and N-H activation of acetanilide in aqueous media: a concise access to functionalized carbazoles in a single step

Green Chem., 2016, Advance Article
DOI: 10.1039/C5GC02937F, Paper

Vignesh Arumugam, Werner Kaminsky, Dharmaraj Nallasamy
NNO Pincer type Pd(II) complex catalyzed one-pot synthesis of N-acetylcarbazoles in aqueous media is presented.

http://pubs.rsc.org/en/Content/ArticleLanding/2016/GC/C5GC02937F?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2FGC+%28RSC+-+Green+Chem.+latest+articles%29#!divAbstract

One-pot, tandem C–H and N–H activation of acetanilides with aryl boronic acids to realize functionalized carbazoles was conveniently performed under aerobic conditions using a novelNNO pincer type Pd(II) complex [Pd(L)Cl] (where L = nicotinic acid (phenyl-pyridin-2-yl-methylene)-hydrazide or furan-2-carboxylic acid (phenyl-pyridin-2-yl-methylene)-hydrazide) as a catalyst in neat water and a very low (0.01 mol%) amount of catalyst. It is worth noting that recyclability up to six consecutive runs and column chromatography free isolation of the title heterocycles in an excellent yield are achieved.

 

Pd(II) pincer type complex catalyzed tandem C–H and N–H activation of acetanilide in aqueous media: a concise access to functionalized carbazoles in a single step

Vignesh Arumugam,^a   Werner Kaminsky^b and  Dharmaraj Nallasamy*^a  

 

 

*Corresponding authors

^aInorganic & Nanomaterials Research Laboratory, Department of Chemistry, Bharathiar University, Coimbatore 641 046, India
E-mail: dharmaraj@buc.edu.in
Web: http://ndharmaraj.wix.com/inrl
Fax: +91 4222422387
Tel: +91 4222428316

^bDepartment of Chemistry, University of Washington, Seattle, USA

Green Chem., 2016, Advance Article

DOI: 10.1039/C5GC02937F

 

One-pot, tandem C–H and N–H activation of acetanilides with aryl boronic acids to realize functionalized carbazoles was conveniently performed under aerobic conditions using a novelNNO pincer type Pd(II) complex [Pd(L)Cl] (where L = nicotinic acid (phenyl-pyridin-2-yl-methylene)-hydrazide or furan-2-carboxylic acid (phenyl-pyridin-2-yl-methylene)-hydrazide) as a catalyst in neat water and a very low (0.01 mol%) amount of catalyst. It is worth noting that recyclability up to six consecutive runs and column chromatography free isolation of the title heterocycles in an excellent yield are achieved.

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Synthesis of vinyl ethers of alcohols using calcium carbide under superbasic catalytic conditions (KOH/DMSO)

Green Chem., 2016, Advance Article
DOI: 10.1039/C5GC02977E, Communication

Ryosuke Matake, Yusuke Adachi, Hiroshi Matsubara
A convenient preparation of vinyl ethers from alcohols with calcium carbide was developed. This protocol is an alternative to the Favorskii-Reppe reaction without any high pressure device.

Synthesis of vinyl ethers of alcohols using calcium carbide under superbasic catalytic conditions (KOH/DMSO)

 LINK       http://pubs.rsc.org/en/Content/ArticleLanding/2016/GC/C5GC02977E?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2FGC+%28RSC+-+Green+Chem.+latest+articles%29#!divAbstract

 Vinyl ethers are important and useful synthetic building blocks. Using a test tube with a screw cap, a convenient preparation of vinyl ethers from alcohols with calcium carbide under superbasic catalytic conditions (KOH/DMSO) was developed. The vinylation of primary and secondary alcohols was successfully achieved, affording the desired products in good yields. The gram-scale preparation of a vinyl ether was also demonstrated. In this reaction, calcium carbide acts as an acetylene source, constituting a safer alternative to acetylene gas.

 F. de Nanteuil, E. Serrano, D. Perrotta and J. Waser, J. Am. Chem. Soc., 2014, 136, 6239.


1H NMR

1H NMR PREDICT using nmrdb , signals may vary , use your discretion to understand sequence

13C NMR

13 C NMR PREDICT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Synthesis of vinyl ethers of alcohols using calcium carbide under superbasic catalytic conditions (KOH/DMSO)

Ryosuke Matake,^a   Yusuke Adachi^a and   Hiroshi Matsubara*^a  

*

Corresponding authors

^a

Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Japan
E-mail: matsu@c.s.osakafu-u.ac.jp

Green Chem., 2016, Advance Article

DOI: 10.1039/C5GC02977E ////////////////////

cis (Z) jasmone

.

 cis (Z) jasmone 

(Can. J. Chem. 1978, Vol 56, p2301)

e.g. How might we attempt to make Z jasmone – an important constituent of many perfumes?

In fact one synthesis uses the following as carbon sources:

It is not clear from this however, how the chemistry might be done!  Therefore just being given the starting materials is not sufficient to help plan a synthesis.
Note the importance of CCBFR.

We need a logical planning method.

Retrosynthetic Analysis (The Disconnection Approach)

Originated by E.J. Corey (Nobel Prize 1990)               p169 – 172

                                                                                    p259 – 260

                                                                                    p354 – 359

Interesting compound, Spoked-wheel macrocycles

.

 

• Chemical Formula: C₇₇₄H₉₉₆N₁₈O₃₆Si₁₂
• Molecular Weight: 11465.32
• Elemental Analysis: C, 81.08; H, 8.76; N, 2.20; O, 5.02; Si, 2.94

 4-({2-[4-(2-{9-[4-(4-{2-[2,5-Bis(octyloxy)-4-(2-{4-[pentakis({4-[2-(4-{2-[4-(4-{2,7-bis[2-(4-{2-[(3-cyanopropyl)bis(propan-2-yl)silyl]ethynyl}-2,5-bis(octyloxy)phenyl)ethynyl]-9H-carbazol-9-yl}phenyl)phenyl]ethynyl}-2,5-bis(octyloxy)phenyl)ethynyl]phenyl})phenyl]phenyl}ethynyl)phenyl]ethynyl}phenyl)phenyl]-7-[2-(4-{2-[(3-cyanopropyl)bis(propan-2-yl)silyl]ethynyl}-2,5-bis(octyloxy)phenyl)ethynyl]-9H-carbazol-2-yl}ethynyl)-2,5-bis(octyloxy)phenyl]ethynyl}bis(propan-2-yl)silyl)butanenitrile

Compound 7

From Fluctuating exciton localization in giant π-conjugated spoked-wheel macrocycles

• A. Vikas Aggarwal,
• Alexander Thiessen,
• Alissa Idelson,
• Daniel Kalle,
• Dominik Würsch,
• Thomas Stangl,
• Florian Steiner,
• Stefan-S. Jester,
• Jan Vogelsang,
• Sigurd Höger
• & John M. Lupton

Nature Chemistry5,964–970(2013)

doi:10.1038/nchem.1758

Supplementary Information

 

C774H996N18O36Si12
Name compound: 4-({2-[4-(2-{9-[4-(4-{2-[2,5-Bis(octyloxy)-4-(2-{4-[pentakis({4-[2-(4-{2-[4-(4-{2,7-bis[2-(4-{2-[(3-cyanopropyl)bis(propan-2-yl)silyl]ethynyl}-2,5-bis(octyloxy)phenyl)ethynyl]-9H-carbazol-9-yl}phenyl)phenyl]ethynyl}-2,5-bis(octyloxy)phenyl)ethynyl]phenyl})phenyl]phenyl}ethynyl)phenyl]ethynyl}phenyl)phenyl]-7-[2-(4-{2-[(3-cyanopropyl)bis(propan-2-yl)silyl]ethynyl}-2,5-bis(octyloxy)phenyl)ethynyl]-9H-carbazol-2-yl}ethynyl)-2,5-bis(octyloxy)phenyl]ethynyl}bis(propan-2-yl)silyl)butanenitrile.

https://www.instagram.com/p/BBMfA4bBkvZY9QhsJV6ff6khLjUE6F9MqBqRu40/

• Synthetic Procedure: See article for the definitive version of this procedure and for full experimental details.6 (19.0 mg, 14.7 µmol), CuI (3.4 mg, 17.7 µmol), Pd₂dba₃(4.0 mg, 4.4 µmol), and tri(t‑butyl)phosphine (6.0 mg, 29.5 µmol) were mixed in a microwave tube and sealed with a septum. In parallel, a solution of 5 (241.7 mg, 132.6 µmol) in piperidine (2 mL) was purged with argon for 1 h. Then the latter was transferred to the microwave tube and the mixture was heated at 120 °C for 16 min in a microwave instrument (max. power: 300 W). After cooling to r.t., the tube was opened and the reaction mixture was diluted with MTBE. The organic phase was washed with aq. H₂SO₄ (10 %) and brine. It was dried over MgSO₄ and the solvent was removed under reduced pressure. The residue was purified by column chromatography (CH:DCM = 65:35 ‑ 68:32), and 7 (126 mg, 10.9 µmol, 74 %) was obtained as a yellow solid. ¹H NMR (500 MHz, CDCl₃, 298 K) δ [ppm] = 8.09 (d, ³J_H,H = 8.2 Hz, 12 H), 7.87 (d, ³J_H,H = 8.5 Hz, 12 H), 7.76 – 7.60 (m, 48 H), 7.55 – 7.46 (m, 12 H), 7.16 (d, ³J_H,H = 8.0 Hz, 12 H), 7.03 (s, 6 H), 7.02 (s, 6 H), 6.96 (s, 12 H), 6.93 (s, 12 H), 6.86 (d, ³J_H,H = 8.1 Hz, 12 H), 4.10 – 3.99 (m, 48 H), 3.99 – 3.90 (m, 24 H), 2.42 (t, ³J_H,H = 7.0 Hz, 24 H), 1.95 – 1.72 (m, 96 H), 1.62 – 1.16 (m, 360 H), 1.15 – 0.97 (m, 168 H), 0.97 – 0.76 (m, 132 H); ¹H NMR (500 MHz, CD₂Cl₂, 298 K) δ [ppm] = 8.14 (d, ³J_H,H = 8.1 Hz, 12 H), 7.92 (d, ³J_H,H = 8.5 Hz, 12 H), 7.79 – 7.66 (m, 36 H), 7.64 (s, 12 H), 7.54 – 7.44 (m, 12 H), 7.20 (d, ³J_H,H = 8.2 Hz, 12 H), 7.05 (s, 6 H), 7.02 (s, 6 H), 6.99 (s, 12 H), 6.97 – 6.93 (m, 24 H), 4.08 – 3.98 (m, 48 H), 3.98 – 3.92 (m, 24 H), 2.41 (t, ³J_H,H = 7.0 Hz, 24 H), 1.96 – 1.71 (m, 96 H), 1.65 – 1.17 (m, 360 H), 1.17 – 0.99 (m, 168 H), 0.99 – 0.76 (m, 132 H); ¹³C NMR (126 MHz, CDCl₃, 298 K) δ [ppm] = 154.78, 154.06, 153.94, 153.79, 141.60, 140.49, 140.41, 140.10, 136.79, 132.63, 131.73, 130.90, 128.94, 127.99, 127.36, 124.58, 123.55, 123.50, 121.54, 121.26, 120.86, 120.21, 118.04, 117.40, 117.28, 116.51, 114.96, 114.65, 114.07, 113.58, 113.47, 104.31, 96.51, 95.56, 94.91, 87.61, 86.62, 70.16, 70.04, 70.00, 69.56, 32.27, 32.25, 32.24, 32.18, 29.82, 29.79, 29.75, 29.73, 29.71, 29.68, 26.52, 26.42, 26.40, 23.14, 23.13, 23.09, 23.08, 21.70, 21.17, 18.65, 18.41, 14.63, 14.57, 14.52, 14.50, 12.20, 10.04; ¹³C NMR (126 MHz, CD₂Cl₂, 298 K) δ [ppm] = 154.88, 154.20, 154.11, 153.93, 141.87, 140.89, 140.63, 140.50, 140.40, 136.88, 132.68, 132.04, 130.83, 129.11, 128.15, 127.61, 124.49, 123.69, 123.50, 121.66, 121.44, 121.10, 120.32, 117.99, 117.47, 117.28, 116.70, 114.90, 114.62, 114.20, 113.84, 113.62, 104.31, 96.45, 95.91, 95.35, 94.94, 87.71, 86.85, 86.80, 70.22, 70.14, 69.82, 32.44, 32.35, 29.97, 29.93, 29.90, 29.88, 29.83, 29.83, 26.69, 26.67, 26.58, 26.54, 23.31, 23.29, 23.25, 23.24, 21.89, 21.22, 18.56, 18.32, 14.57, 14.50, 14.45, 14.43, 12.35, 10.14;MS (MALDI-TOF, DCTB) (calcd. for C₇₇₄H₉₉₆N₁₈O₃₆Si₁₂ monoisotopic: 11455.39, distr. max.: 11465.32): m/z11965.9 [M+2*DCTB]⁺, 11716.6 [M+DCTB]⁺, 11465.3 [M]⁺, 5856.8 [M+DCTB]²⁺, 5733.5 [M]²⁺; GPC (in THF vs. PS): M_p = 11580 g mol^-1.

Soheil Zabihi
 http://www.nature.com/nchem/journal/v5/n11/compound/nchem.1758_comp7.html
http://www.nature.com/nchem/journal/v5/n11/extref/nchem.1758-s1.pdf
http://www.nature.com/nchem/journal/v5/n11/extref/nchem.1758-s1.pdf

Affiliations

1. Kekulé-Institut für Organische Chemie und Biochemie der Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany

   • A. Vikas Aggarwal,
   • Alissa Idelson,
   • Daniel Kalle,
   • Stefan-S. Jester &
   • Sigurd Höger

2. Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA

   • Alexander Thiessen &
   • John M. Lupton

3. Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstrasse 31, D-93040 Regensburg, Germany

   • Dominik Würsch,
   • Thomas Stangl,
   • Florian Steiner,
   • Jan Vogelsang &
   • John M. Lupton

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SMILES: CCCCCCCCOC(C=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C(OCCCCCCCC)=C1)=C1C#CC2=CC3=C(C=C2)C4=C(C=C(C#CC5=C(OCCCCCCCC)C=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C(OCCCCCCCC)=C5)C=C4)N3C(C=C6)=CC=C6C(C=C7)=CC=C7C#CC(C=C8OCCCCCCCC)=C(OCCCCCCCC)C=C8C#CC(C=C9)=CC=C9C%10=C(C%11=CC=C(C#CC%12=C(OCCCCCCCC)C=C(C#CC%13=CC=C(C%14=CC=C(N%15C(C=C(C#CC%16=CC(OCCCCCCCC)=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C=C%16OCCCCCCCC)C=C%17)=C%17C%18=C%15C=C(C#CC%19=CC(OCCCCCCCC)=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C=C%19OCCCCCCCC)C=C%18)C=C%14)C=C%13)C(OCCCCCCCC)=C%12)C=C%11)C(C%20=CC=C(C#CC%21=C(OCCCCCCCC)C=C(C#CC%22=CC=C(C%23=CC=C(N%24C(C=C(C#CC%25=C(OCCCCCCCC)C=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C(OCCCCCCCC)=C%25)C=C%26)=C%26C%27=C%24C=C(C#CC%28=C(OCCCCCCCC)C=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C(OCCCCCCCC)=C%28)C=C%27)C=C%23)C=C%22)C(OCCCCCCCC)=C%21)C=C%20)=C(C%29=CC=C(C#CC%30=CC(OCCCCCCCC)=C(C#CC%31=CC=C(C%32=CC=C(N%33C(C=C(C#CC%34=C(OCCCCCCCC)C=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C(OCCCCCCCC)=C%34)C=C%35)=C%35C%36=C%33C=C(C#CC%37=C(OCCCCCCCC)C=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C(OCCCCCCCC)=C%37)C=C%36)C=C%32)C=C%31)C=C%30OCCCCCCCC)C=C%29)C(C%38=CC=C(C#CC%39=C(OCCCCCCCC)C=C(C#CC%40=CC=C(C%41=CC=C(N%42C(C=C(C#CC%43=CC(OCCCCCCCC)=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C=C%43OCCCCCCCC)C=C%44)=C%44C%45=C%42C=C(C#CC%46=CC(OCCCCCCCC)=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C=C%46OCCCCCCCC)C=C%45)C=C%41)C=C%40)C(OCCCCCCCC)=C%39)C=C%38)=C%10C%47=CC=C(C#CC%48=C(OCCCCCCCC)C=C(C#CC%49=CC=C(C%50=CC=C(N%51C(C=C(C#CC%52=C(OCCCCCCCC)C=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C(OCCCCCCCC)=C%52)C=C%53)=C%53C%54=C%51C=C(C#CC%55=CC(OCCCCCCCC)=C(C#C[Si](C(C)C)(C(C)C)CCCC#N)C=C%55OCCCCCCCC)C=C%54)C=C%50)C=C%49)C(OCCCCCCCC)=C%48)C=C%47