Synthesis of Novel 2-Amino-4-aryl-5-arylthio-6-methoxypyrimidines and 3(5)-Aryl-4-arylthio-5(3)-methylthiopyrazoles via α-Oxo-α-arylthioketene dithioacetals - Singh, Gurdeep; Deb, Biswajit; Ila, Hiriyakkanavar; Junjappa, Hiriyakkanavar (Synthesis, 1987)