Synthesis of β-Lactams by 4-exo-tet Cyclization Process Induced by Electrogenerated Cyanomethyl Anion, Part 2:[1] Stereochemical Implications
作者:Marta Feroci
DOI:10.1002/adsc.200700156
日期:2007.9.3
An efficient electrochemically inducedsynthesis of chiral cis β-lactams has been described, via deprotonation of chiral amides containing an acidic methylene group and a bromine atom as leaving group and bearing a chiral auxiliary or amine function. The electrogenerated base – cyanomethylanion – is easily obtained by galvanostatic reduction of acetonitrile-tetraethylammonium hexafluorophosphate solutions