Regioselective convergent synthesis of 2-arylidene thiazolo[3,2- a ]pyrimidines as potential anti-chikungunya agents.

Convergent and convenient regioselective synthesis of novel thiazolo[2,3- a ]pyrimidine derivatives was accomplished using the one-pot reaction of 6-ethylthiouracil, bromoacetic acid, anhydrous sodium acetate, acetic anhydride, acetic acid and suitable aldehyde. X-ray crystallographic study reveals the presence of the Z configuration of only one regioisomer confirmed by computational studies as being the most likely isomer present.