A Novel One-Pot Procedure for the Stereoselective Synthesis of α-Hydroxy Esters from Ortho Esters
作者:Matthias Breuning、Tobias Häuser、Eva-Maria Tanzer
DOI:10.1021/ol901214n
日期:2009.9.17
A novel one-pot procedure for the stereoselective synthesis of α-hydroxy esters from ortho esters was developed. Key steps were multi-heteroatom Cope rearrangements of O-acylated N-hydroxy-l-tert-leucinol-derived oxazoline N-oxides leading to α-acyloxy oxazolines and, after methanolysis, to the target molecules in 67−80% yield and 94−98% ee.
开发了一种新颖的一锅法,用于从原酸酯立体选择性地合成α-羟基酯。关键步骤是多的杂原子的柯普重排ö -acylated Ñ羟基升-叔-leucinol衍生恶唑啉Ñ -oxides导致α酰氧基恶唑啉和,甲醇分解之后,到目标分子在67-80%的产率和94 −98%ee。