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IPC部
B(2)
C(2)
IPC大类
B01(2)
IPC小类
B01J(2)
IPC
B01J019/00(2)
发明人
公开年
申请年
2020(2)
专利权人
Preparing sildenafil free base by e.g. treating aryl aldehyde derivatives with amino derivatives in presence of acid catalyst to cyclized pyrimidin-one derivatives and continuous flow reaction of resultant in presence of chlorosulfuric acid.
PABBARAJA S, SINGH A K, STHALAM V K, MAHAJAN B
Environment-friendly preparation device of 5-methoxy-4,6-dichloro-pyrimidine, has reaction cylinder which is provided with ceramic liner, and inner surface layer of ceramic liner is provided with anti-sticking layer.
LI T
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