Efficient One-Pot Synthesis of Cyclopenta[b]thiophen-1-ones and 1,3-Di(2-thiophenyl)propan-1-ones from Thiophenes
作者:Ivan L. Baraznenok、Valentine G. Nenajdenko、Elizabeth S. Balenkova
DOI:10.1055/s-1997-1207
日期:1997.4
The reaction of N,N-dimethylacrylamide/triflic anhydride complex with substituted thiophenes led to the corresponding cyclopenta[b]thiophen-1-ones and 1,3-di(2-thiophenyl)propan-1-ones. The application of 2-bromo-N,N-dimethylacrylamide in this reaction allows 2-bromo-substituted five- or seven-membered thiophene-fused cyclic ketones to be obtained.
N,N-二甲基丙烯酰胺/三氟乙酸酐复合物与取代噻吩的反应产生了相应的环戊[b]噻吩-1-酮和1,3-二(2-噻吩基)丙酮。该反应中使用2-溴-N,N-二甲基丙烯酰胺能够获得2-溴取代的五元或七元噻吩融合环酮。