Preparation and X-ray structure of a new organo-P–O–S heterocycle
Abstract
Reaction of 1, 3-epithio-1λ5, 3λ5-naphtho[1,8-cd][1,2,6]thiadiphosphinine-1,3-dithione 5 with 3,5-di-tert-butylcatechol gives 3,5-di-tert-butyl-1,8-epithio-1λ5, 8λ5-naphtho[1,8-cd][1,7,2,6]benzodioxadiphosphonine-1,8-dithione 7 which, from X-ray studies, contains fused C2P2S and C2O2P2S rings.