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- Benzimidazoles(3a-c,5a-c) were synthesized in a one step reductive cyclization reaction of(o-nitroanilines)(1,4) and aryl aldehydes(2a-c). 邻硝基苯胺(1;4)与芳香醛(2a-c)在连二亚硫酸钠存在下共热;发生还原关环反应;一步即可合成苯并咪唑类化合物(3a-c;5a-c).
- Aqueous titanium trichloride promoted intermolecular reductive cyclization of 1,2 -diketone and o-nitroaniline in basic media provides a convenient method for the synthesis of quinoxaline derivatives. 本文研究了三氯化钛水溶液作用下,邻硝基苯胺与1,2-二酮在碱性介质中分子间的成环反应,提供了一个方便地合成取代喹喔啉类化合物的方法。
- Two important routes to prepare functionalized siloles, namely “endo-endo mode intramolecular reductive cyclization of diynes”and “metallacycle transfer”, were reviewed in this paper. 本文介绍了官能化噻咯的两种重要合成方法,即炔的内向内向型分子内还原关环法和环内金属转换法,并对其特点、适用范围及发展方向作了分析和展望。
- By nucleophilic addition and reductive cyclization reaction of the three intermediates, respectively, some azo-heterocyclic derivatives containing a rosinyl skeleton were obtained. 该3个中间体分别经过亲核取代、还原关环反应后,得到了一些脱氢松香酸甲酯含氮杂环衍生物;
- Keywords quinoline;reductive cyclization;2-nitrochalcone;indium;iodine; 喹啉;还原环化;2-硝基查尔酮;铟;碘;
- Low-valent Titanium Induced Reductive Cyclization of o-Nitrobenzamides and Ketones 低价钛引起的邻硝基苯甲酰胺与酮的还原成环反应
- Synthesis of Benzimidazoles from o-Nitroanilines in a One-Step Reductive Cyclization Process 邻硝基苯胺还原关环一步法合成苯并咪唑类化合物
- reductive cyclization 还原性环化
- Cyclization occurs readily with dilute alkali. 遇到稀碱就容易环化。
- Their views of life were reductive and depreciabory. 他们对生活的希望减少了、降低了。
- Their views of life were reductive and depreciatory. 他们对生活的希望减少了、降低了。
- The conversion of ??to organic cell constituents is a reductive process. ?肿0化为有机的细胞成分是还原过程。
- Suitable folr felalspar glazes, reductive firing at high temperature. 适合长石釉,高温还原烧成。
- RF system were superior to Dick and Luque in effect on reductive fixation. RF复位固定效果上优于Dick、Luque,在临床应用上应根据病人的具体情况而定。
- Extracting wine and skins from Ganimedes tanks is far more reductive. 而由嘉尼米德罐中排放酒和果皮的工作量则远远少得多。
- Experimental results show the relationship of the additional reductive agent. 讨论了涂覆液成分的影响。
- Levocetirizine Dihydrochloride was prepared from benzoyl chloride by acidylation,hydrogenation,cyclization with an overall yield of 8.05%. 以苯甲酰氯为原料;经酰化;还原;环合等反应合成左旋西替利嗪盐酸盐;反应总收率为8.;05%25。
- The complexities are dizzying, so it may help to be reductive for a moment. 这个问题非常复杂,因此暂时简化一下可能会有所帮助。
- Study progress on cyclization of citronellal to(-)-isopulegol over catalysts is reviewed. 综述催化香茅醛环化为(-)-异胡薄荷醇的催化剂研究进展.
- Sodium ethylate was used as catalyst in Baker-Venkataraman of cyclization, and all factors were studied. 环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂,研究了影响反应的各个因素。