reactions of alcohols with silyl chlorides in the presence of N-methylimidazole were significantly accelerated by the added iodine, and on this basis a general, and high yielding method for efficient silylation of primary, secondary, and tertiary alcohols was developed.
present a new method for the selective C(sp3)–H cyanation of adamantanederivatives with PINO as the hydrogen abstracting reagent. A cyano radical is thereby transferred from p -toluenesulfonyl cyanide, allowing the cyanation of adamantanederivatives in up to 71% yield. The protocol presents a novel way to orthogonally functionalized adamantanes that are otherwise difficult to prepare. Mechanistic studies
An efficient silylating system for 1 degrees, 2 degrees, and 3 degrees, alcohols, consisting of a silyl chloride/N-methylimidazole/iodine, was developed. Synthetic and mechanistic aspects of this new reagent system, and particularly the role of iodine were investigated in detail using H-1 NMR spectroscopy. (C) 2008 Elsevier Ltd. All rights reserved.