作者:Scott Handy、Yanan Zhang
DOI:10.1055/s-2006-950305
日期:2006.11
The regioselectivity of the Suzuki couplings of several 4,5- and 3,4-dibromopyrrole-2-carboxylate esters has been studied. In general, regioselectivity can be achieved for initial coupling at the more electron-deficient site (C5 and C3, respectively). At the same time, conversions are often modest (40-60%) and attempts to force the reactions to higher conversions often lead to competitive dicoupling.
研究了几种 4,5- 和 3,4- 二溴吡咯-2-羧酸酯的铃木偶联反应的区域选择性。一般来说,在较缺电子的位点(分别为 C5 和 C3)进行初始偶联时,可以实现区域选择性。与此同时,转化率往往不高(40-60%),试图将反应推向更高的转化率往往会导致竞争性二偶联。