A zwitterionic phosphonium salt of Formula I: wherein n is 0 or 1; R is H or SO3-; R' is selected from the group consisting of C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, C3-C10 cycloalkyl, phenyl, substituted phenyl, benzyl and C1-C10 alkoxycarbonyl; R' is CX3 when n is O; and X is selected from the group consisting of F, Cl, Br and I. The zwitterionic phosphonium salts are useful reagents for the preparation of alkenes and acetals from the corresponding aldehyde.
式I的带零点荷的
磷酸铵盐:其中n为0或1;R为H或SO3-;R'从C1-C10烷基,C2-C10烯基,C2-C10炔基,C3-C10环烷基,苯基,取代苯基,苄基和C1-C10烷氧羰基组成的群体中选择;当n为O时,R'为CX3;X从F,Cl,Br和I组成的群体中选择。这些带零点荷的
磷酸铵盐对从相应醛制备烯烃和
缩醛物是有用的试剂。