Stereochemistry of base-catalyzed ring opening of 1, 3, 2-oxathiaphospholanes. Absolute configuration of 2-N- (Rc) -1- (. alpha. -naphthyl) ethylamino-2-thiono-1, 3, 2-oxathiaphospholanes and O, S-dimethyl N- (Rc) -1- (. alpha. -naphthyl) ethylphosphoramidothioates | Synapse