Modification of the SOCl₂-RCO₂H reaction route by a vicinal arsenic(III): A novel conversion of 2-carboxyphenyldi-phenylarsine into the first stable acyloxy-chloroarsorane

Abstract

2-Carboxyphenyldiphenylarsine (4) reacts with SOCl₂ to yield the first stable monocyclic acyloxy-chloroarsorane, 1-chloro-1, 1-diphenyl-2,1 A 5-benzoxarsol-3-one [(1), E ;= As] through the successive intermediate formation of 2-dichlorodiphenylarsoranobenzolc acid (<strong>5c</strong>)/(<strong>5d</strong>), 2-hydroxychlorodiphenylarsoranobenzoyl chloride (<strong>5a</strong>)/(<strong>5b</strong>) and the HCl adduct (5e) of [(<strong>1</strong>), E = As].