Room-Temperature Columnar Liquid-Crystalline Perylene Imido-Diesters by a Homogeneous One-Pot Imidification-Esterification of Perylene-3,4,9,10-tetracarboxylic Dianhydride
作者:Julien Kelber、Harald Bock、Olivier Thiebaut、Eric Grelet、Heinz Langhals
DOI:10.1002/ejoc.201001346
日期:2011.2
The reaction of PTCDA (perylene-3,4,9,10-tetracarboxylic dianhydride) with an alcohol, a bromoalkane, and an alkylamine in the presence of DBU in DMF yields imido-diestersubstituted perylenes. The reaction is limited to polar alcohols such as propanol, but longer alkyl chains are efficiently introduced in a second step by alkyl group exchange by using selective acidic ester hydrolysis that leaves the
PTCDA(苝-3,4,9,10-四羧酸二酐)与醇、溴烷烃和烷基胺在 DBU 存在下在 DMF 中反应生成亚氨基二酯取代的苝。该反应仅限于极性醇,如丙醇,但在第二步中,通过使用选择性酸性酯水解使酰亚胺基团保持完整,通过烷基交换有效引入更长的烷基链。这种对亚胺二酯的胺有效方法用于获得受体型自组装染料,该染料在室温下形成六方柱状液晶相。