Stereoselective synthesis of vinylic chalcogenides through vinylic substitution by lithium organylchalcogenolates
摘要:
Enol phosphates and enol tosilates of P-dicarbonyl compounds react with lithium organoselenolates to give beta-organo-seleno (Z) -alpha,beta-unsaturated carbonyl compounds. Tetrasubstituted vinylic vic-bis(organylchalcogenides) of (E)-geometry have been prepared by this method. (C) 2007 Elsevier Ltd. All rights reserved.