11-hydroxyimino-6-[2-[4-(2-methoxyphenyl)piperazin-1-yl]ethyl]-2-thia-6,8-diazatricyclo[6.3.1.04,12]dodeca-1(12),3-diene-5,7-dione 在
甲烷磺酸 、 phosphorus pentoxide 作用下,
反应 2.0h,
以18%的产率得到3,4,5,7,9,10-hexahydro-4<2-<4-(2-methoxyphenyl)piperazin-1-yl>ethyl>-9H-thieno<4,3,2-de>pyrimido<1,2-a><1,4>diazepine-3,5,10-trione