1) Cyclization
[英][,saikli'zeiʃən] [美][,saɪklɪ'zeʃən, ,sɪklɪ-]
成环
1.
Cycloleucine in total yield of 52% was synthesized from glycine by a five-step reaction of esterification,amidation,dehydration,cyclization and hydrolysis,and then treated with cationic ion-exchange resin.
以甘氨酸为起始原料,经酯化、酰胺化、脱水、成环及水解5步反应后,过阳离子交换柱合成了环亮氨酸,总收率52%,其结构经1H NMR和IR确证。
2) ring opening and closing
开环成环
3) cyclic addition
成环加成
4) environmental cost
环境成本
1.
To build the system of environmental cost for coal mining and to construct eco-civilization diggings;
建设“生态文明”环境成本量化体系矿区
2.
Development of PVC enterprises and primary discussion of management of environmental cost;
PVC企业发展与环境成本管理初探
3.
Exploration of the essessment system for the environmental cost in materials industry;
材料工业的环境成本评估体系探索
5) cyclization reaction
成环反应
1.
Then 4-oxy-7-methyl-1,8-naphththyridine-3-carboxylic acetate was synthesized by cyclization reaction in different heat carr.
在250℃的反应温度下,分别以二苯醚、石蜡油和邻苯二甲酸二乙酯为热载体进行成环反应,得到4-氧-7-甲基-1,8-萘啶-3-羧酸乙酯的收率分别为88。
6) addition-cyclization
加成环化
1.
2-Formyl-3-acetyl-4-methyl-5-carbobenzoxypyrrole(6) was synthesized via the selective oxidation of 2,4-dimethyl-3-acetyl-5-carbobenzoxypyrrole(5),which was produced from acetylacetic benzylester(1) via nitrosation,reduction and addition-cyclization with acetylacetone.
以乙酰乙酸苄酯(1)为原料,经过亚硝化、还原、与乙酰丙酮加成环化生成2,4-二甲基-3-乙酰基-5-苄氧羰基吡咯(5),通过选择性氧化反应制得目标化合物2-甲酰基-3-乙酰基-4-甲基-5-苄氧羰基吡咯(6),反应的总收率约为34%。
补充资料:成环加成聚合
分子式:
CAS号:
性质:又称环化聚合。多官能团单体在聚合过程中生成主链含有环状结构的聚合称为成环聚合。成环聚合又可分为缩聚成环和加聚成环两类。当分子内存在两个以上非共轭双键的烯类单体(如二甲基二烯丙基溴化铵)时,其链增长反应是发生在分子内的双键之间的加成反应,生成具有环状结构的聚合物,这种聚合就是成环加成聚合。
CAS号:
性质:又称环化聚合。多官能团单体在聚合过程中生成主链含有环状结构的聚合称为成环聚合。成环聚合又可分为缩聚成环和加聚成环两类。当分子内存在两个以上非共轭双键的烯类单体(如二甲基二烯丙基溴化铵)时,其链增长反应是发生在分子内的双键之间的加成反应,生成具有环状结构的聚合物,这种聚合就是成环加成聚合。
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参考词条