Direct Coupling Reaction between Alcohols and Silyl Compounds: Enhancement of Lewis Acidity of Me<sub>3</sub>SiBr Using InCl<sub>3</sub>
作者:Takahiro Saito、Yoshihiro Nishimoto、Makoto Yasuda、Akio Baba
DOI:10.1021/jo061512k
日期:2006.10.1
The combination of InCl3 and Me3SiBr provided an enhanced Lewis acid system that can be used to promote a wide range of direct coupling reactions between alcohols and silyl nucleophiles in non-halogenated solvents, such as hexane or MeCN. The enhanced Lewis acidity of this system was measured by the C-13 NMR in terms of the coordination to an alcohol. Moreover, the interaction between Me3SiBr and the In(III) species was revealed by Si-29 NMR spectral analysis. Highly chemoselective allylations toward a hydroxyl moiety over ketone and acetoxy ones have been demonstrated.
Brown, Paul A.; Bonnert, Roger V.; Jenkins, Paul R., Journal of the Chemical Society. Perkin transactions I, 1991, # 8, p. 1893 - 1900
作者:Brown, Paul A.、Bonnert, Roger V.、Jenkins, Paul R.、Lawrence, Nicholas J.、Selim, Mohammed R.