Recyclable Polymeric .PI.-Acid Catalyst Effective on Mannich-Type Reaction in Water
作者:Yukio Masaki、Kouichi Yamazaki、Hyouei Kawai、Tomoyasu Yamada、Akichika Itoh、Yoshitsugu Arai、Hiroshi Furukawa
DOI:10.1248/cpb.54.591
日期:——
Polymer-supported dicyanoketene acetal (poly-DCKA-1), synthesized by copolymerization of a DCKA bearing a 4-vinylbenzyl group with ethyleneglycol dimethacrylate, was found to be an excellent recyclable catalyst for the three-component Mannich-type reaction of aldehydes, aromatic amines, and TMS enolate of ethyl isobutyrate in water as the sole solvent.
通过将带有4-乙烯基苄基的DCKA与乙二醇二甲基丙烯酸酯共聚而合成的聚合物负载的双氰基乙缩醛(poly-DCKA-1)被发现是醛,芳烃三组分曼尼希型反应的极佳可回收催化剂。胺和异丁酸乙酯的TMS烯酸酯在水中作为唯一溶剂。