A Powerful Cascade Approach for Expeditious Synthesis of Trifluoromethylated Furans
摘要:
A powerful approach to synthesize trifluoromethylated furans has been developed. The method is operationally simple, broad in substrate scope, and amenable to scale-up using trifluoroacetic anhydride. Meanwhile, the strategy not only provided a versatile approach to synthesize trifluoromethylated furans but also provides a new method for exploring the new reactivity of trifluoroacetic anhydride.
A new hybrid catalyst has been developed by incorporating nicotinic acid onto an organomodified silica. The catalyst was applied as a heterogeneous catalyst for the synthesis of benzoyl fumarate. The reactions work well in the presence of 20 wt % of the catalyst at room temperature to produce the desired products in high yield. The catalyst could be recovered and reused without appreciable change in activity. (C) 2013 Elsevier Ltd. All rights reserved.
Poly(4-vinylpyridine-co-ethylvinylbenzene) as heterogeneous reusable catalyst for the synthesis of benzoyl fumarate
作者:Bishwapran Kashyap、Prodeep Phukan
DOI:10.1007/s00706-015-1531-7
日期:2016.4
Poly(4-vinylpyridine-co-ethylvinylbenzene) 25 % cross-linked (with divinylbenzene) has been found to be an effective heterogeneous catalyst for the synthesis of benzoyl fumarate from aldehyde and dimethyl acetylenedicarboxylate. Various aromatic aldehydes undergo this reaction with good yield in presence of 15 wt% of the catalyst. The catalyst was recovered and reused six times without appreciable alteration in activity.