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本文报道卤化烷氧羰基烷基三苯基鏻[Ph_3(?)VHR~1CO_2R~2]X~-(1,R~1=H 或 CH_3,R~2=CH+3,C_2H_5,或 n-C_5H_(11),X=Br 或 I),在 N,N-二甲基甲酰胺中,100℃左右加热时所发生的分解反应.当鏻盐1的酯烷基 R~2为甲基时,生成产物为[Ph_3(?)CH_2R~1]X~-(2)或[Ph_3(?)CHR~1CH_3]X~-(3),有时也生成2和3的混合物.当鏻盐1的酯烷基 R~2为乙基或正戊基时,只生成产物2.
It has been reported that alkoxycarbonylalkyltriphenylphosphonium halides [Ph_3 (?) VHR ~ 1CO_2R ~ 2] X ~ (1, R ~ 1 = H or CH 3, R ~ 2 = CH + 3, C 2 H 5, C_5H_ (11), X = Br or I) in N, N-dimethylformamide at about 100 ° C. When the ester alkyl group R 2 of phosphonium salt 1 is methyl (2) or [Ph_3 (?) CHR ~ 1CH_3] X ~ - (3), and sometimes produce a mixture of 2 and 3. When the phosphonium salt 1 When ester alkyl R ~ 2 is ethyl or n-pentyl, only product 2 is formed.