Selective synthesis of unsymmetric dibenzo[a,e]pentalenes by a rhodium-catalysed stitching reaction
作者:Keisuke Takahashi、Shingo Ito、Ryo Shintani、Kyoko Nozaki
DOI:10.1039/c6sc04560j
日期:——
developed for the synthesis of unsymmetric dibenzo[a,e]pentalenes. The introduction of appropriately sized silyl groups on the starting substrates led to a high crossover selectivity without using an excess amount of either substrate. The present stitching reaction could produce a variety of unsymmetric dibenzo[a,e]pentalene derivatives, including those with electronically different substituents on the
已经开发了铑催化的2-(甲硅烷基乙炔基)芳基硼酸酯和2-(甲硅烷基乙炔基)芳基溴化物之间的拼接反应,用于合成不对称的二苯并[ a,e ]戊烯。在起始底物上引入适当大小的甲硅烷基基团导致高的交换选择性,而无需使用过量的任一种底物。当前的缝合反应可产生多种不对称的二苯并[ a,e ]戊烯衍生物,包括在稠合的苯环上具有电子上不同的取代基的那些以及杂芳烃稠合的化合物。还证明了脱甲硅烷基化卤化反应可合成相应的卤化二苯并[ a,e戊烯,可用作进一步化学转化的基础。