Polystyryl-BEMP as an Efficient Recyclable Catalyst for the Nucleophilic Addition of Nitroalkanes to α,β-Unsaturated Carbonyl Compounds under Solvent-Free Conditions
作者:R. Ballini、L. Barboni、L. Castrica、F. Fringuelli、D. Lanari、F. Pizzo、L. Vaccaro
DOI:10.1002/adsc.200800117
日期:2008.6.9
3-dimethylperhydro-1,3,2-diazaphosphorine supported on polystyrene (PS-BEMP) is an efficient catalyst for the addition of nitroalkanes (1–1.5 equiv.) to α,β-unsaturated carbonyl compounds (1.0 equiv.) in the absence of a reaction medium (solvent-free conditions). The corresponding γ-nitro carbonyl compounds have been isolated in excellent yields but the catalyst can be satisfactorily recovered and used for only 3 times
2叔-聚苯乙烯(PS-BEMP)上负载的Butylimino-2-diethylamino-1,3-dimethylperhydro-1,3,2-diazaphosphorine(PS-BEMP)是一种有效的催化剂,可将α1-β-不饱和硝基烷烃加成(1-1.5当量)在没有反应介质的情况下(无溶剂条件)羰基化合物(1.0当量)。已经以优异的产率分离了相应的γ-硝基羰基化合物,但是由于磁力搅拌导致催化剂珠粒的碎裂从而阻碍了其完全回收,因此可以令人满意地回收该催化剂并且仅将其使用3次。为了优化催化剂的再利用并提高无溶剂条件的环境效率,已经建立了第一个无溶剂循环连续流反应器。