Lewis Acid-Mediated Highly Regioselective S<sub>N</sub>2-Type Ring-Opening of 2-Aryl-<i>N</i>-tosylazetidines and Aziridines by Alcohols
作者:Manas K. Ghorai、Kalpataru Das、Dipti Shukla
DOI:10.1021/jo0703294
日期:2007.7.1
Lewis acid-mediated highly regioselective S(N)2-type ring-opening of 2-aryl-N-tosylazetidines with alcohols to afford various 1,3-amino ethers in excellent yields with good enantiomeric excess is described. Similar S(N)2-type ring-opening of chiral 2-phenyl-N-tosylaziridine with various alcohols produces the corresponding nonracemic 1,2-amino ethers in excellent yields and good ee. The mechanism of the ring-opening of aziridines and azetidines via an S(N)2 pathway is supported by the formation of nonracemic amino ethers.