Enantioselective concomitant creation of vicinal quaternary stereogenic centers via cyclization of alkynols triggered addition of azlactones
作者:Zhi-Yong Han、Rui Guo、Pu-Sheng Wang、Dian-Feng Chen、Han Xiao、Liu-Zhu Gong
DOI:10.1016/j.tetlet.2011.08.123
日期:2011.11
An asymmetric cyclization of alkynols triggered addition of azlactones catalyzed by a combined catalyst system consisting of a chiral gold phosphate and a phosphoric acid produces conformationally restricted amino acid precursors bearing vicinal quaternary stereogenic centers in high levels of stereoselectivity. (C) 2011 Elsevier Ltd. All rights reserved.