ethyl 3-amino-2-cyano-5-(4-(dimethylamino)phenyl)-7-methyl-5H-thiazolo[3,2-a]pyrimidine-6-carboxylate 在
aluminum oxide 、 polyphosphate ester 、
盐酸羟胺 作用下,
反应 0.02h,
以70%的产率得到ethyl 3-amino-8-(4-dimethylaminophenyl)-6-methyl-1H,8H-pyrazole[d-3,4]thiazole[a-2,3]pyrimidine-7-carboxylate