Synthesis of Carbamate Derivatives of Dibromodibenzo[d,g][1,3,6,2] Dioxathiaphosphocin 6-oxides

Abstract

6-Alkylcarbamato-2,10-dibromodibenzo[d,g][1,3,6,2]dioxathiaphosphocin 6-oxides were prepared by cyclisation of 5,5′-dibromo-2,2′-dihydroxydiphenyl sulfide with dichlorophosphinyl carbamates/thiocarbamates, obtained by the addition of alcohols/thiols to dichloroisocyanatophosphine oxide, and characterised by IR, 1H, 13C, 31P NMR and mass spectral studies.