Aw. Erian et al., Phosphonium ylides in organic synthesis III. A novel synthesis of alpha-substituted ylides and pyrazole systems, SYN COMMUN, 29(9), 1999, pp. 1527-1534
A novel synthesis of alpha-substituted phosphonium ylides and pyrazole syst
ems via the treatment of hydrazonoyl halides 1 with phosphoranes 2 and 6, r
espectively is reported.