Re2O7-catalyzed three-component synthesis of protected secondary and tertiary homoallylic amines
作者:Suman Pramanik、Prasanta Ghorai
DOI:10.1039/c2cc15472b
日期:——
Three-componentsynthesis of protected secondary and "for the first time" tertiary homoallylic amines is achieved from carbonyl, carbamate, and allyltrimethylsilanes using a Re(2)O(7)-catalyst under mild and open flask conditions. Excellent chemoselectivities and diastereoselectivities were observed.
An efficient method for the one-pot synthesis of secondary and tertiary N-homoallylic carbamates using catalytic amount of HBF4 center dot OEt2 is described. The reaction proceeded smoothly to afford the corresponding N-homoallylic carbamates in good to high yields. Operationally simple and easily scalable features make this method more practical over existing methods. Use of HBF4 center dot OEt2 as an acid catalyst also proves the catalytic activity of fluorinated acid catalyst in this important organic transformation. (C) 2014 Elsevier B.V. All rights reserved.