closing ring 挡圈 ; 关闭环 ; 止动环 ; 收紧的圈
Ring-Closing Metathesis 复分解关环反应
Closing The Ring Ltd 制作公司
ring closing 合环
ring closing react 关环反应 ; 闭环反应 ; 成环作用
ring closing metathesis 反应 ; 关环复分解
Alongside, the chemical reactions for the key steps in this synthesize process i. e, the condensation, decomposition, ring-closing, separation, etc. are given.
给出了合成过程中缩合，分解、闭环，离析等关键步骤的化学反应；
The five quinazoline compounds were prepared by using 2 amino 4,5 dimethoxy benzoic acid as original material, which underwent ring closing, halogenation and substitution.
方法：以2 氨基4 ，5 二甲氧基苯甲酸为原料，分别经过环化、氯代、取代等反应，合成了五种目标化合物。
Then coupling with A ring synthon, closing, deprotection, the aim product was synthesized finally.
然后再与A环合成子偶联、关环、脱保护完成目标产物的全合成。
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