n. cyclization
misc. ring formation
吡啶并吡嗪/咪唑杂环化合物的合成研究 关键词: 吡啶衍生物;氮杂环;胺醛;缩合;成环[gap=1198]ine derivatives; nitrogen-containing heterocyclic; amine-aldehyde; condensation; cyclization
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d蛋白质与蛋白质相互作用 ② 反式作用因子作用方式: a成环(looping):DNA成环使相应位点接近而发挥调节作用。 b扭曲:(twisting):反式作用因子扭曲改变DNA的构型发挥调节作用。
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Schiff base is a kind of very important ligand, and its functional group of -C=N-double bond is inclined to coordinate with metals and to be ring formation.
席夫碱是一类非常重要的配体,它的-C=N-双键官能团使其具有易配位、易成环等特点。
参考来源 - 甲亚胺基水杨醛、吡啶醛类不对称席夫碱配合物的合成、表征及催化性能研究Nolatrexed was synthesized by nitrification, bromination, reduction, condensation, oxidation by concentrated sulfuric acid, oxidation by hydrogen peroxide, acylation, cyclization, esterification, Ullmann reaction successfully in 2% total yields starting from toluene.
本文以甲苯为起始原料经过硝化、溴化、还原、缩合、浓硫酸氧化、双氧水氧化、酰化、酯化、成环、Ullmann反应成功合成了诺拉曲特,收率为2%。
参考来源 - 抗肿瘤药物诺拉曲特的合成·2,447,543篇论文数据,部分数据来源于NoteExpress
世界最大的户内加倍使滚筒游乐车成环!
成环的网络中的流量可以导致网络的瘫痪。
These unblocked loops can cause network failures because of excessive traffic.
同时,探讨了DAT的成环反应历程,阐述了阴离子高效萃取的原理。
The mechanism of cyclization of DAT and the principle of the anion extraction were also discussed.
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