Triphenylphosphine → 5-Ethoxycarbonylpenta-2,4-dienyltriphenylphosphonium bromide

Participants

Reaction Steps

To a stirred solution of triphenylphosphine (34 g.) in dry benzene (300 ml.) was added ethyl 6-bromohexa-2,4-dienoate (30 g.). After 18 hours, the benzene was decanted from the precipitated paste which solidified on adding diethyl ether and was ground up and filtered to give 5-ethoxycarbonylpenta-2,4-dienyltriphenylphosphonium bromide (40 g.), m.p. 139°-144° C.

Provenance & Evidence