sulphides is displaced by a cyano, allyl, or 2-oxocyclohexyl group on treatment with trimethylsilylcyanide, allyltrimethylsilane, or 1-trimethylsilyloxycyclohexene, respectively, in the presence of a Lewis acid.
Enantioselective Synthesis of α‐Thiocarboxylic Acids by Nitrilase Biocatalysed Dynamic Kinetic Resolution of α‐Thionitriles
作者:Kate Lauder、Silvia Anselmi、James D. Finnigan、Yuyin Qi、Simon J. Charnock、Daniele Castagnolo
DOI:10.1002/chem.202001108
日期:2020.8.17
The enantioselectivesynthesis of α‐thiocarboxylic acids by biocatalytic dynamic kinetic resolution (DKR) of nitrile precursors exploiting nitrilase enzymes is described. A panel of 35 nitrilase biocatalysts were screened and enzymes Nit27 and Nit34 were found to catalyse the DKR of racemic α‐thionitriles under mild conditions, affording the corresponding carboxylic acids with high conversions and
Sulfenylation Accompanied by Dealkoxycarbonylation of β-Keto Esters, Geminal Diesters, and α-Cyano Ester in Hexamethylphosphoric Triamide (HMPA)
作者:Morio Asaoka、Kazutoshi Miyake、Hisashi Takei
DOI:10.1246/bcsj.51.3008
日期:1978.10
In the presence of sodium iodide, diphenyl disulfide reacted with geminal diesters, β-keto esters, and α-cyano esters in hexamethylphosphoric triamide (HMPA) at 150–160 °C to give alkyl phenyl sulfides and α-phenylthio esters, ketones, and nitriles, respectively, along with evolution of carbon dioxide.
在碘化钠存在下,二苯基二硫化物在 150-160 °C 的温度下与六甲基三磷酰胺 (HMPA) 中的宝石二酯、β-酮酯和α-氰酯发生反应,分别生成烷基苯基硫化物和α-苯基硫代酯、酮和腈,同时产生二氧化碳。
α-(Benzotriazolyl)methyl phenyl thioethers: Convenient reagents for α-phenylthioalkylation of silylated nucleophiles
作者:Alan R. Katritzky、Jie Chen、Sergei A. Belyakov
DOI:10.1016/s0040-4039(96)01493-1
日期:1996.9
Stable, crystalline α-(benzotriazolyl)methylphenyl thioethers (1), easily prepared from carbonyl compounds, thiophenol and benzotriazole, are convenient reagents for the phenylthiomethylation of trimethylsilyl cyanide, trimethylallylsilane, and trimethylsilyl enol ethers to afford the corresponding substituted thioethers and β-phenylthioalkylketones (3) in good yields.