A new and efficient conversion of olefins into thiiranes using diethoxyoxophosphoranesulfenyl chloride

An expedient synthesis of thiiranes is described that involves electrophilic addition of diethoxyoxophosphoranesulfenyl chloride to alkenes followed by fluoride anion promoted conversion of the intermediate adducts into thiiranes. © 1997 John Wiley & Sons, Inc. Heteroatom Chem 8: 429–433, 1997     

New Six-Coordinate Phosphorus Compounds. Synthesis and Stereochemistry

Abstract

Synthesis and stereochemistry of several new six-coordinate organophosphorus compounds are discussed.     

Preparation of hexacoordinated tris(bidentate) phosphorus compounds with 1,3,2-dioxaphosphorinane rings. NMR and X-ray crystallographic studies of their conformation

A series of new unstable tris(bidentate) hexacoordinated phosphorus compounds 1 with 1,3,2-dioxaphosphorinane rings was prepared and studied by NMR and X-ray crystallography. The X-ray crystal structures showed that the 1,3,2-dioxaphosphorinane ring adopts different conformations depending on the number and size of substituents at the carbon atom C14. Substituents are deployed around the phosphorus atom in a slightly deformed octahedral structure. Deviations in bond lengths around the phosphorus atom depend on the character of the bonds and the distribution of the negative charge. (1)H and (13)C NMR measurements showed that in solution the flexibility of 1,3,2-dioxaphosphorinane ring depends on the size of substituents at the carbon C14.