Phosphonates containing sulfur and selenium. Synthesis of vinylphosphonates bearing α-sulfenyl, α-selenenyl, α-sulfinyl and α-seleninyl moieties and studies on nucleophilic addition
作者:Wanda H. Midura、Jerzy A. Krysiak
DOI:10.1016/j.tet.2004.10.026
日期:2004.12
efficiently to α-phosphorylvinyl sulfoxides or α-phosphorylvinyl selenides depending on the reaction conditions. Oxidation of α-phosphorylvinyl selenides and subsequent thermolysis of selenoxides afford alkynylphosphonates. Studies of the stereochemical course of nucleophilic addition to α-phosphoryl sulfoxides show high facial stereoselectivity of the reaction, however, epimerisation at the α-carbon atom leads
General Route to Racemic and Enantiomeric Carbo- and Heterocyclic Vinyl Sulfoxides via Tandem Michael Addition/Horner Olefination of α-Phosphorylvinyl Sulfoxides
作者:Marian Mikołajczyk、Jerzy A. Krysiak、Wanda H. Midura、Michał W. Wieczorek、Ewa Różycka-Sokołowska
DOI:10.1021/jo061463b
日期:2006.11.1
heterocyclic and carbocyclic vinyl sulfoxides has been developed which involves reaction of α-phosphorylvinyl sulfoxides with carbonyl compounds bearing oxygen, nitrogen, and carbon nucleophilic centers. Use of optically active α-phosphorylvinyl p-tolyl sulfoxides in this tandem Michael addition/Horner olefination reaction leads to the corresponding optically active cyclic sulfoxides. In this way, a variety of