Wednesday, 14 May 2014

Kinetic Resolution of Diols by Etherification



Kinetic Resolution of Diols by Etherification

Total synthesis of (+)-sacidumlignan D through etherification-based kinetic resolution
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Comparing Catalysts










The selectivity of ligand-capped palladium catalysts in hydrogenation reactions is compared with their lead-poisoned equivalents
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Giant Vesicles from Sophorolipids










Sophorolipids based on linolenic acid self-assemble into giant-vesicle-type structures with membranes similar to those of cell walls
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Oxacycle Synthesis










New approach to synthesis of spirocyclic ethers, aryl ethers, and various oxacycles including oxetanes
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Making Mushroom Molecules









A synthetic route to prepare an unusual tricyclic fungal alkaloid has been developed
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Saturday, 19 April 2014

A highly efficient approach to vanillin starting from 4-cresol




Green Chem., 2014, Advance Article
DOI: 10.1039/C4GC00003J, Paper
Jian-An Jiang, Cheng Chen, Ying Guo, Dao-Hua Liao, Xian-Dao Pan, Ya-Fei Ji
A highly efficient three-step approach to vanillin has been developed starting from 4-cresol.

A highly efficient approach to the famous flavor and fragrance compound vanillin has been developed starting from 4-cresol with the attention focused on improving the sustainability of all the reactions. The approach involves a three-step sequence of the quasi-quantitative selective clean oxybromination of 4-cresol, the high-yield selective aerobic oxidation of 2-bromo-4-cresol, and the quantitative methoxylation of 3-bromo-4-hydroxybenzaldehyde with the recovery of pure methanol. Herein, the pivotal oxidation and methoxylation reactions are logically investigated and developed into two concise methodologies. As a green alternative, the approach holds significant value for the sustainable manufacturing of vanillin.

Oxyhalogenation of thiols and disulfides into sulfonyl chlorides/bromides using oxone-KX (X = Cl or Br) in water




A simple and rapid method for efficient synthesis of sulfonyl chlorides/bromides by oxyhalogenation of thiols and disulfides with oxone-KX (X = Cl or Br) using water as the solvent is described.


Green Chem., 2014, Advance Article
DOI: 10.1039/C4GC00246F, Paper
Sridhar Madabhushi, Raveendra Jillella, Vinodkumar Sriramoju, Rajpal Singh
A simple and efficient method for synthesis of sulfonyl chlorides/bromides by oxyhalogenation of thiols and disulfides with oxone-KX (X = Cl or Br) using water as the solvent is presented