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遇到稀碱就容易环化。Cyclization occurs readily with dilute alkali.

提出了可能的环化反应机理。A possible mechanism for the cyclization reaction was suggested.

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此外，若利用溴水或是大量的二溴化铜也可以进行这些环化反应。Bromine as well as catalystic could also promoted this cyclization reaction.

自由基环化反应是合成环状化合物的有力工具之一。Radical cyclization is a powerful method for the synthesis of cyclic compounds.

DNA分子的环化是研究其本身柔韧性的主要方法。The major process to study DNA instinctive flexibility is DNA cyclization assay.

以柠檬桉叶油为主要原料经环化、催化氢化二步反应得到薄荷醇。Menthol was obtained from lemon eucalyptus oil via cyclization and catalytic hydrogenation.

探讨了呋喃酚环合反应质子酸催化机理。The mechanism was discussed in the proton acid catalytic reaction of furan phenol cyclization.

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综述了二碘化钐在分子内环化反应中的应用。Application of samarium diiodide in mediating intramolecular cyclization reactions was reviewed.

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.

至于将矽基酮的部分换成醛基时，自由基反应则无法进行。In contrast, switching the acylsilane functionality to an aldehyde, the radical cyclization failed.

环合反应的条件缓和，产品收率和纯度高，在四氢咔唑类化合物的化学制备中具有重要参考价值。The conditions of reaction of cyclization were moderate, the purity and yield of the product was higher.

首次系统地研究了不同金属离子对两个结构不同的线型七肽环化反应的影响。The influence of different metal ions on the cyclization of two different linear heptapeptides was studied.

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根据实验结果，我们推测反应的关键步骤为亲核进攻。According to the experimental results, it was assumed that the cyclization was taken by nucleophilic attack.

中间体5和9经环合、成盐反应制得盐酸依福地平。After cyclization between intermediates 9 and 5, and salt formation, efonidipine hydrochloride could be obtained.

发展基于第一性原理的科学计算方法并将其用于自由基环合反应。It is devoted to develop a scientific methodology based on first principles to deal with radical cyclization reactions.

利用金属铟2-硝基查尔酮类化合物还原分子内环化合成喹啉类化合物在这儿首次报道。The reductive intramolecular cyclization of 2-nitrochalcones to quinolines by using indium powder was first reported here.

方法以对甲磺酰基苯乙酮为原料，经溴代、缩合和环合三步反应合成了产物。METHOD The title compound was synthesized from p-methylsulfonyl-acetophenone via bromination , condensation and cyclization.

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方法以乙酰乙酸乙酯为起始原料，经酰化、环合、溴化3步反应合成溴匹立明。METHODS Bropirimine was synthesized by 3 steps reaction of acylation, cyclization and bromination with ethyl acetoacetate as staring material.

其次，以对甲苯磺酸为催化剂，将DPAP与邻苯二甲酸酐在180℃下环合，得到目标产物DPAF。Then, the dye DPAF was synthesized by cyclization of the intermediate DPAP with phthalic anhydride at 180℃ in the presence ofp-toluenesulfonic acid.

集总组分之间主要发生烷烃脱氢环化、环烷烃脱氢芳构化和加氢裂化反应。That is dehydrogenation and cyclization of paraffins, dehydrogenation and aromatization of naphthenes, and cracking reaction to form C 5 lighter products.