作者:Yumiko Suzuki、Abu Bakar, M.D.、Kazuyuki Muramatsu、Masayuki Sato
DOI:10.1016/j.tet.2006.01.101
日期:2006.4
N-Heterocyclic carbenes produced in situ from salts of imidazolium, benzimidazolium, pyrido[1,2-c]imidazolium, imidazolinium, thiazolium, and triazolium catalyze the addition of trimethylsilylcyanide to aldehydes to yield cyanohydrin trimethylsilyl ethers. The use of C2-symmetric imidazolidenyl carbene derived from (R,R)-1,3-bis[(1-naphthyl)ethyl]imidazolium chloride led to enantioselective cyanosilylation
由咪唑鎓盐,苯并咪唑鎓盐,吡啶并[1,2- c ]咪唑鎓盐,咪唑啉鎓盐,噻唑鎓盐和三唑鎓盐原位产生的N-杂环卡宾催化向醛中添加三甲基甲硅烷基氰化物,生成氰醇三甲基甲硅烷基醚。衍生自氯化(R,R)-1,3-双[(1-萘基)乙基]咪唑鎓的C 2对称的咪唑烷基烯基卡宾导致对映选择性氰基硅烷化。