Regioselective hydrazidohydroxylation of styrenes with N-acetylaminophthalimide using phenyliodine(III) bis(trifluoroacetate) was carried out to afford 1-aryl-2-(N-acetyl-N-phthalimido)aminoethyl trifluoroacetates in high yields. The procedure is operationally simple and removal of trifluoroacetyl and phthalimido groups was performed by treatment of the trifluoroacetate with hydrazine hydrate in good yield. A synthetic study and a mechanistic proposal for the hydrazidohydroxylation are presented.
利用苯基
碘(III)双(
三氟乙酸盐)对
苯乙烯类化合物与 N-乙酰
氨基邻苯二甲
酰亚胺进行了区域选择性
肼基羟基化反应,从而高产率地得到了 1-芳基-2-(N-乙酰基-N-邻苯二甲
酰亚胺基)
氨基乙基
三氟乙酸盐。该方法操作简单,通过用
水合
肼处理
三氟乙酸根来去除三
氟乙酰基和邻苯二甲
酰亚胺基,收率很高。本文介绍了
肼基羟基化的合成研究和机理建议。