A Non-cryogenic Method for the Preparation of 2-(Indolyl) Borates, Silanes, and Silanols
作者:Enrique Vazquez、Ian W. Davies、Joseph F. Payack
DOI:10.1021/jo026087j
日期:2002.10.1
2-Indolyl borates are prepared via addition of LDA to a mixture of N-Boc-indole and triisopropyl borate at 0-5 degreesC. Following acidic hydrolysis, the boronic acids are isolated by crystallization in good to excellent yield (73-99%). The method is quite general, tolerating a wide range of functional groups, and also provides access to 2-silyl derivatives (80-91%).