作者:SANJEEV PRAN MAHANTA、PRADEEPTA KUMAR PANDA
DOI:10.1007/s12039-011-0128-x
日期:2011.9
The acid catalysed condensation of diketones with pyrrole did not result in the formation of expected divergent bisdipyrromethane always; instead the product depends on the chain length of the diketones, in particular the distance between the two carbonyl functional groups. When the two carbonyl groups are linked via one or two methylene groups, unusual ring annulation occurs resulting in the formation
酸催化的二酮与吡咯的缩合反应不会始终形成预期的发散性双二吡咯甲烷。相反,产物取决于二酮的链长,特别是两个羰基官能团之间的距离。当两个羰基通过一个或两个亚甲基连接时,会发生异常的环环化反应,从而形成各种桥联联吡咯。然而,随着间隔物长度的进一步增加,在两个羰基之间,可以实现预期的双二吡咯甲烷的合成。 利用末端链烷二酮(n≥3)与吡咯的简单酸催化缩合反应,合成了以烷基链为间隔基的发散性双二吡咯甲烷。用较短的桥连的烷基链,得到环状的产物。