P-Chiral thioxaphosphoranesulphenyl chlorides [RR<sup>1</sup>P(S)SCl]. Unique stereochemical probe for the nucleophilic displacements at the dico-ordinate sulphur
作者:Andrzej Lopusiński、Lech Luczak、Jan Michalski
DOI:10.1039/c39890001694
日期:——
P-Chiral thioxaphosphoranesulphenyl chlorides [RR1P(S)SCI](R =L-menthoxy, R1= EtO) are synthesized in high yield and with optical purity, they are shown to undergo nucleophilic attack at the dico-ordinatesulphur centre by a synchronous mechanism.
P-chiral thioxophosphoranesulfenyl chlorides RR'P(S)SCL. A unique stereochemical probe to study nucleophilic displacement at a dicoordinate sulfur center
作者:Lech Łuczak、Andrzej Łopusiński、Jan Michalski
DOI:10.1016/s0040-4020(98)00529-8
日期:1998.8
react with secondary amines such as morpholine or dicyclohexyl amine. All these displacement reactions proceed with almost complete stereochemical integrity at the phosphorus atom. These abservations support a synchronous mechanism of bond breaking and bond formation during nucleophilicdisplacement at the dicoordinate sulfur atom. The same can be said about the reaction of sulfenamides 9a,b,c with hydrogen