Indole-3-Acetic Acids and Hetero Analogues by One Pot Synthesis including Heck Cyclisation
作者:David Wensbo、Ulf Annby、Salo Gronowitz
DOI:10.1016/0040-4020(95)00601-4
日期:1995.9
Bz-substituted indole-3-acetic acid ethyl esters (14e-g) and heteroanalogues, i.e. thienopyrroles (14a, c) and selenolopyrrole (14d), were prepared starting from N-BOC protected o-iodo aryl amines. Allylation with ethyl 4-bromocrolonate, followed by palladium-catalysed ring closure in a one pot reaction, yielded N-BOC protected indoles (13e-g), thienopyrroles (13a-c), and selenolopyrrole (13d). The
从N-BOC保护的邻碘碘芳基胺开始,制备Bz取代的吲哚-3-乙酸乙酯(14e-g)和杂类似物,即噻吩并吡咯(14a,c)和硒代吡咯(14d)。与4-溴丁烯酸乙酯进行烯丙基化,然后在一个锅中进行钯催化的闭环反应,得到N-BOC保护的吲哚(13e-g),噻吩并吡咯(13a-c)和硒代吡咯(13d)。吸附在二氧化硅上后,BOC基团很容易被热除去。类似地制备了氧噻吩并吡咯(11a-c)。