SEARCH Articles Figures Tables 2-Amino thiophen 3- thiophene, synthesis 3-Amino-2- thiophene 4- Acyl-5-amino Acyl-thiophenes Acylation of thiophene Acyls synthesis Amino acylations Gewald synthesis Of thiophene Synthesis of Thiophenes Thiophene 2- acyl Thiophene acylation Thiophenes acylation Thiophenes, synthesis