Synthesis and spectral analysis of 8-substituted dinaphtho [2,1-d:1′,2′-g] [1,3,6,2]dioxathiaphosphocin 8-oxides

Synthesis and spectral analysis of several 8-substituted dinaphtho[2,1-d:1′,2′-g][1,3,6,2]dioxathiaphosphocin 8-oxides have been described. An X-ray crystallographic study of 8-(2′,3′- dimethylphenoxy)dinaphtho[2,1 - d:1′,2′-g][1,3,6,2]dioxathiaphosphocin 8-oxide has indicated that, in the solid state, the dioxathiaphosphocin ring is in a distorted-boat–like conformation with the P = O group and bridged S atom directed away from each other. Electron impact mass spectra showed M⁺ and (M–OR)⁺ ions, containing the dioxathiaphosphocin ring system, confirming the structures of the esters. © 1995 John Wiley & Sons, Inc.