The reaction of α- or β-methylstyrene with phenylpalladium chloride in aqueous acetone were studied. From cis- or trans-β-methylstyrene, a mixture of erythro and threo isomers of hydroxyphenylation products PhMeCHCHOHPh (VIa, VIb) and chlorophenylation products PhMeCHCHClPh (IVa, IVb) were obtained accompanying the phenylated olefins (I, II, and III). The main reaction product was the tertiary alcohol PhCH2C(OH)MePh (V). The reaction of α-methylstyrene with phenylpalladium chloride gave V exclusively. Phenylpalladium acetate and phenylpalladium bromide were used as phenylating agents. The yields of hydroxyphenylation products are in decreasing order: chloride>bromide>acetate.
研究了 α- 或 β-
甲基苯乙烯与
苯基
氯化钯在
丙酮水溶液中的反应。从顺式或反式-β-
甲基苯乙烯中,伴随着
苯基化
烯烃(I、II 和 III),得到了羟
苯基化产物 PhMeCHCHOHPh(VIa、VIb)和
氯苯基化产物 PhMeCHClPh(IVa、IVb)的赤式和叔式异构体混合物。主要反应产物为叔醇 PhCH2C(OH)MePh(V)。α-
甲基苯乙烯与
苯基
氯化钯反应只生成 V。
苯基
钯醋酸盐和
苯基
钯溴化物被用作
苯基化剂。羟
苯基化产物的产率依次递减:
氯化物>
溴化物>
醋酸盐。