采用金属钙、脱水液氨、载体纳米二氧化硅及改性剂乙腈与环氧丙烷制备出氨钙体系催化剂。
Calcium ammine catalyst was prepared with metal calcium, dehydrated liquid ammonia as raw materials, nano-silica as a carrier and acetonitrile and propylene epoxide as modifiers.
是取化基，如乙氧基、甲氧基及它们的环氧和烷氧同系物或卤基。
R "is a replaceable function, e. G. Acetoxy, methoxy, their acyloxy and alkoxy homologs or halo."
选择甲基丙烯酸二甲基氨基乙酯来改性丙烯酸树脂，获得带有反应性氨基的丙烯酸树脂，进而制备了改性丙烯酸环氧粉末涂料。
By using dimethylamino ethyl methacrylate to modify acrylate resin, we acquired a new type of acrylate resin with reactive amino group. Further, we engineered a modified acrylic-epoxy powder coating.
以对甲苯乙酮和三氟醋酸乙酯为原料，经缩合、环合两步反应得到2型环氧酶抑制剂赛来昔布，总收率为6 7%。
Celecoxib as a cyclooxygenase-2 inhibitor, was synthesized from p-methylacetophenone and ethyl trifluoroacetate by successively condensation and cyclization in 67% overall yield.
以对甲苯乙酮和三氟醋酸乙酯为原料，经缩合、环合两步反应得到2型环氧酶抑制剂赛来昔布，总收率为6 7%。
Celecoxib as a cyclooxygenase-2 inhibitor, was synthesized from p-methylacetophenone and ethyl trifluoroacetate by successively condensation and cyclization in 67% overall yield.
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