Hypervalent Iodine(III) Mediated Decarboxylative Halogenation of Indolecarboxylic Acids for the Synthesis of Haloindole Derivatives
作者:Yasuyoshi Miki、Hiromi Hamamoto、Hideaki Umemoto、Misako Umemoto、Chiaki Ohta、Masashi Dohshita
DOI:10.1055/s-0030-1258585
日期:2010.10
The treatment of 1-methylindole-2,3-dicarboxylic acid with hypervalent iodine(III) reagent, phenyliodine diacetate (PI-DA), in the presence of lithium bromide gave 1-methyl-3,3-dibromooxindole. However, the reaction of 1-(phenylsulfonyl)indole-2,3-dicarboxylic acid with PIDA in the presence of lithium bromide afforded 2,3-dibromo-1-(phenylsulfonyl)indole. In a similar manner, the 2,3-dichloro- and
在溴化锂存在下,用高价碘 (III) 试剂、二乙酸苯碘 (PI-DA) 处理 1-甲基吲哚-2,3-二羧酸得到 1-甲基-3,3-二溴吲哚。然而,在溴化锂存在下,1-(苯基磺酰基)吲哚-2,3-二羧酸与PIDA反应得到2,3-二溴-1-(苯基磺酰基)吲哚。以类似的方式,2,3-二氯-和2,3-二碘-吲哚衍生物是通过吲哚-2,3-二羧酸与PIDA在氯化锂和碘化锂存在下的反应获得的。