4-(dimethylamino)-3-nitrobenzenecarbothioamide 、
7-氧杂二环[4.1.0]庚烷-2-酮 、
甲醇 在
silica gel 、 Tetrahydrofurane dichloromethane 作用下,
反应 0.67h,
以providing four products (see Example 11-28) as well as 2-[4-(methylamino)-3-nitrophenyl]-4,5,6,7-tetrahydro-1,3-benzothiazol-7-ol (Example 33) and N-[4-(7-methoxy-4,5,6,7-tetrahydro-1,3-benzothiazol-2-yl)-2-nitrophenyl]-N-methylamine (Example 34)的产率得到2-[4-(methylamino)-3-nitrophenyl]-4,5,6,7-tetrahydro-1,3-benzothiazol-7-ol