Solvent-Free Condensation of Methyl Pyridinium and Quinolinium Salts with Aldehydes Catalyzed by DBU
作者:Linda Loucif Seiad、Didier Villemin、Nathalie Bar、Messaoud Hachemi
DOI:10.1080/00397911.2010.528573
日期:2012.3.1
Abstract Methylpyridinium and methylquinolinium salts were condensed under solvent-free conditions with aromatic aldehydes in the presence of 1,8-diazabicyclo[5.4.]undec-7-ene (DBU) as catalyst, by grinding at room temperature. The products are dyes or useful intermediates. The DBU can be easily recycled and reused. GRAPHICAL ABSTRACT
摘要 在1,8-二氮杂双环[5.4.]十一碳-7-烯(DBU)催化剂存在下,在无溶剂条件下,将甲基吡啶鎓和甲基喹啉鎓盐与芳香醛缩合,在室温下研磨。产品为染料或有用的中间体。DBU 可以轻松回收和再利用。图形概要