Synthesis of Nonsymmetrical 5-Aryl-2-indolopyrrole Derivatives via Controlled Mono Suzuki-Miyaura Cross-Coupling on N-Boc-2,5-dibromopyrrole
作者:Robert Dodd、Floriane Beaumard、Philippe Dauban
DOI:10.1055/s-0030-1258284
日期:2010.12
The first example of mono Suzuki-Miyaura cross-coupling of N-Boc-2,5-dibromopyrrole with a boronic acid (indol-2-ylboronic acid) is reported. The resulting 2-indolyl-5-bromopyrrole derivative was in turn coupled with a variety of aryl- or heteroarylboronic acids thereby providing the corresponding non-symmetrical 2,5-disubstituted pyrroles in good to excellent yields. The tert-butoxycarbonyl (Boc)
报道了N -Boc-2,5-二溴吡咯与硼酸(吲哚-2-基硼酸)的单铃木-宫浦交叉偶联的第一个实例。然后将所得的2-吲哚基-5-溴吡咯衍生物与各种芳基-或杂芳基硼酸偶联,从而以良好至优异的产率提供相应的非对称的2,5-二取代的吡咯。该叔丁氧羰基(BOC)基团可以很容易地除去,得到脱保护完全产品。 交叉偶联-铃木宫浦-吲哚-吡咯-钯催化