An Optically Active Selenonium Salt

Abstract

WE have shown that bromo-ethyl benzyl bromide condenses with phenyl-dichloro-arsine in the presence of sodium to give 2-phenyl -1: 2: 3: 4-tetrahydro-iso-arsinoline¹, which readily combines with p-chlorophenacyl bromide to give 2-phenyl-2-p-chlorophenacyl-1: 2: 3: 4- tetrahydro - iso - arsinolinium bromide (I). This salt contains an asymmetric arsenic atom, and we were able to resolve it into optically active forms, the corresponding dextro and laevo isoarsinolinium picrates having [M]_D + 457° and -450° respectively in chloroform solution.