Facile stereoselective synthesis of cis- and trans-3-alkoxyazetidin-2-ones
作者:Aman Bhalla、Paloth Venugopalan、Shamsher S. Bari
DOI:10.1016/j.tet.2006.06.062
日期:2006.8
A highly stereoselectivesynthesis of cis- and trans-3-alkoxy-3-phenyl/benzylthioazetidin-2-ones is described. The reaction of α-chlorosulfide-β-lactams with various alcohols catalyzed by a Lewis acid such as ZnCl2 in the presence of molecular sieves (3–4 Å) leads to cis-3-alkoxy-3-phenyl/benzylthio-β-lactams whereas treatment of potassium 2-alkoxy-2-phenylthioethanoate with appropriate Schiff's base