Regio- and Stereoselective Allylation and Crotylation of Indoles at C2 Through the Use of Potassium Organotrifluoroborate Salts
作者:Farhad Nowrouzi、Robert A. Batey
DOI:10.1002/anie.201207978
日期:2013.1.14
A practical method for the allylation, prenylation, propargylation, and diastereoselective crotylation of indoles has been developed using air‐ and moisture‐stable potassiumorganotrifluoroborate reagents (see scheme). Lewis acids such as BF3⋅Et2O promote addition to afford 2‐allyl‐ and 2‐crotylindolines in high yields and diastereoselectivities.