Sacrificial anode technique has been used to synthetize title compounds in two different ways. First, use was made of alpha-chloronitriles as the starting materials, zinc as the anode and a THF-HMPA mixture as the solvent. Second, use of an aluminium-made anode, the nitrile being at the same time the substrate and the solvent was shown to be also efficient.
Catalytic cyanomethylation of various carbonyl compounds with (trimethylsilyl)acetonitrile (TMSCH2CN) in the presence of Lewis bases such as cesium or lithium acetate proceeded smoothly to afford t...
Cyanoethylation of Trichlorosilane. II. α-Addition
作者:Shunichi Nozakura、Shiro Konotsune
DOI:10.1246/bcsj.29.326
日期:1956.3
Contrary to the case of β-cyanoethylation, α-cyanoethylation of trichlorosilane was found to take place in an autoclave in the presence of either pyridine or platinized asbestos. In the reactions in sealed glass tubes, on the other hand, stainless steel and pyridine, mono- and tetrapyridine nickel chloride, and nickel chloride pyridine hydrochloride complex were effective for the α-addition. An ionic
A catalytic cyanomethylation of various aldimines with trimethylsilylacetonitrile (TMSCH2CN) in the presence of Lewis bases such as lithium acetate or benzoate proceeded smoothly to afford the corr...
A simple and efficient protocol was developed for the preparation of challenging α-aryl primary amides. This metal-free coupling process was triggered by TfOH-promoted electrophilicactivation of α-silyl nitrile to generate keteniminium ion species, followed by reaction with aryl sulfoxide through [3,3]-sigmatrophic rearrangement to provide the target product. To the best of our knowledge, α-silyl
The direct silylation by Me3SiCl/Li/THF of saturated nitriles having a hydrogen atom in the α position with respect to the function leads, according to a simple and rapid process, to the corresponding α-silylated nitriles in yields that are moderate but much higher than those given by the comparable previously known routes. α, β-Unsaturated nitriles give the derivatives resulting from the disilylation
通过Me 3 SiCl / Li / THF对具有相对于功能的α原子有氢原子的饱和腈进行直接甲硅烷基化反应,根据简单而又快速的方法,可以得到相应的α-甲硅烷基化的腈,收率适中,但比以前已知的可比路线给出的要高得多。α,β-不饱和腈可得到双键二甲硅烷基化的衍生物。烯丙基或苄基氰化物和二苯乙腈首先经过腈基(其表现为卤素原子)的消除,而氰基胺提供双(三甲基甲硅烷基)碳二亚胺,在进一步甲硅烷基化后得到意外的三(三甲基甲硅烷基)胺。