Reactions of ketene dithioacetal for a new versatile synthesis of 4,5-substituted 3-aminothiophene-2-carboxylate derivatives
作者:Satish M. Chavan、Raghunath B. Toche、Vasant M. Patil、Pankaj B. Aware、Poonam S. Patil
DOI:10.1080/17415993.2016.1156117
日期:2016.7.3
ABSTRACT Poly substituted3-aminothiophenes were successfully synthesized in good yields by using a one-pot protocol via ketene S,S-acetal as an intermediate in basic medium (K2CO3/N,N-dimethylformamide) followed by Dieckmann condensation with ethyl bromoacetate. Further, chemistry of thiophenes was explored using active functional groups such as C3–NH2, C4–CN and C5–SCH3 on the thiophene nucleus.