Vicinal bromostannanes as novel building blocks for the preparation of di- and trisubstituted imidazoles
作者:Laszlo Revesz、Frédérique Bonne、Paschalia Makavou
DOI:10.1016/s0040-4039(98)01056-9
日期:1998.7
imidazole-based vicinal bromostannanes 5a-c have been developed for the regioselective preparation of 2,4,5-tri- and 4,5-disubstituted imidazoles. The novel building blocks are particularly attractive for Stille and Suzuki couplings that involve valuable aryl or heteroaryl halides, where conversion to the equivalent stannanes or boranes/boronic acids would represent an inviable option.
已经开发了三种新颖的基于咪唑的邻位溴化芳烃5a-c,用于区域选择性制备2,4,5-三-和4,5-二取代的咪唑。对于涉及有价值的芳基或杂芳基卤化物的Stille和Suzuki偶联,新的构建基块特别有吸引力,在这些偶联中,转化为同等的锡烷或硼烷/硼酸将是一个不可行的选择。