The ozonolysis of substituted isoxazoles was investigated. The ozonolysis rates and the products were dependent on the site of the substituent group on isoxazole ring. The reaction mechanism of the ozonolysis of isoxazoles was also proposed.
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