Three-component condensation of 2-aminothiophene-3-carboxylic acid derivatives with aldehydes and Meldrum’s acid
作者:B. V. Lichitsky、A. N. Komogortsev、A. A. Dudinov、M. M. Krayushkin
DOI:10.1007/s11172-008-0295-1
日期:2008.10
thiophene ring has been developed. Labile 2-aminothiophenes have been obtained by the in situ decarboxylation of unstable 2-amino-3-thiophenecarboxylic acids. The three-component condensation of 2-aminothiophenes with aromatic aldehydes and the Meldrum’s acid is the key step of the process.
已经开发了使用在噻吩环的 3 位未取代的 2-氨基噻吩合成 4,7-二氢-5H-噻吩并 [2,3-b] 吡啶-6-酮的新方法。不稳定的 2-氨基-3-噻吩羧酸通过原位脱羧获得了不稳定的 2-氨基噻吩。2-氨基噻吩与芳香醛和 Meldrum 酸的三组分缩合是该过程的关键步骤。