Condensation of N,N-dimethyl-p-nitrosoaniline with 2-thioxo-2H-thieno[
2,3-d]thiazole-6(5H)-ones 2a, 2b and 2-thioxo-2H-thieno [2,3-d]-1,3-di
thiole-6(5H)-one 3, leads unexpectedly to the formation of 2,1-benziso
thiazole derivatives (C) 1998 Elsevier Science Ltd. All rights reserve
d.