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- pyridinium ylide 吡啶叶立德
- Application of Pyridinium Salts to Organic Syntheses. 英文文献格式 WU; Pinga; WANG;etc.
- The preparation of pure pyridinium dichromate is described. 三氧化铬与吡啶反应制备吡啶重铬酸盐。
- How to choose the base used in the synthesis of arsine ylide is studied. 本文主要研究了胂叶立德合成中碱的选择。
- Interestingly, the stereoselectivity of ylide cyclopropanation could be controlled by the choice of the base used for the formation of ylide. 有趣的是，选择不同的碱，能够控制该叶立德环丙反应的立体化学。
- Pyridinium chlorochromate absorbed on silicon gel is prepared and evaluated as a convenient oxidant.This reagent is easily prepared and very stable. 利用二氧化硅作载体,负载氯铬酸吡啶制备了一种新的载体氧化剂,研究了该氧化剂的氧化性。
- METHODS 3,4,5-trimethoxy-triphenyl benzylidene bromide phosphine salt,the important precursor of the phosphine Ylide,was synthesis from deoxidize,bromization and addition. 方法以3,4,5-三甲氧基苯甲醛为原料,经过还原、溴代、加成三步反应得到叶立德前体3,4,5-三甲氧基苄溴三苯基膦盐。
- Methods:Using bromoactate as starting material, ylide was prepared.Ylide and fullerene were used to produce the methano[C60] fullerene carboxylate and hydrolyze it. 方法:用溴乙酸乙酯制备硫叶立德,再与富勒烯[C60]制得相应的富勒烯[C60]羧酸乙酯,水解其乙酯。
- Currently there are several sorts of antibacterial polymers such as polymers containing heavy metal cations, pyridinium and quaternary ammonium salt polymers, and N-halamine . 在众多类型的抗菌高分子材料中,卤胺型的抗菌高分子材料由于其独有的可再生性能及广谱的抗菌性,受到学术界的广泛关注。
- Arecoline was synthesized from nicotinic acid by esterification, N-methylation to form pyridinium saltfollowed by reduction with NaBH4/HOAc in an overall yield of 53.6%. 烟酸经酯化、N-甲基化后在乙醇中用硼氢化钠-乙酸体系进行还原,得到槟榔碱,总收率53。6%25。
- Three strategies (additive, chiral auxiliary or chiral reagent) were developed to improve the diastereoselectivity or enantioselectivity of the ylide cyclopropanation reactions. 通过添加剂、手性辅基、手性试剂等3种策略,分别控制反应的非对映选择性和对映选择性。
- The synthesis and application of dipyridine chromium oxide and pyridinium chlorochromate was introduced,The reaction machanism of oxidation was also discussed. 我们对三氧化铬吡啶溶液中最具代表性的氧化剂三氧化铬二吡啶及三氧化铬吡啶盐酸盐的合成、应用及氧化机理作了一些探讨。
- One new prodrug of dihydropyridine pyridinium salt was synthesized via acylation 、 acylamination、 quaterisation and reduction with nicotinic acid as starting material. 以烟酸为原料,经酰氯化、酰胺化、季胺化和还原得到二氢吡啶-吡啶?盐类前药1个。
- The study of optimum conditions of the colour reaction of scandium with chrome azurol S in the presence of tetradecyl pyridinium chloride and emulgent OP is reported in this paper. 研究了在氯化十四烷基吡啶及乳化剂OP存在下,铬天青S与钪显色反应的适宜条件。
- The research advance of synthesis of various nitrogenous chiral ionic liquids such as imidazolium, ammonium, pyridinium, etc. and its application in asymmetric catalytic reactions was summarized. 摘要综述咪唑鎓盐、季铵盐和吡啶鎓盐等含氮手性离子液体的合成及其在不对称催化反应中的应用研究进展。
- The floatation separation behaviuor of Pd2+ by KBr-cetyl pyridinium bromide system in the presence of NaNO3 and the conditions for the separation of Pd2+ from other metal ions were studied. 研究了硝酸钠存在下,溴化十六烷基吡啶-溴化钾体系浮选分离钯的行为及与一些金属离子分离的条件。
- Synthesis of Arsonium Ylide's Precursors 砷叶立德前体化合物的合成
- Keywords Halocarbene;Carbonyl Ylide;Deoxygenation; 卤代卡宾;羰基叶立德;脱氧;
- Keywords Ylide;Alkyne;Organo-fluoro compound; 叶立德;炔烃;含氟有机化合物;
- Keywords styryl pyridinium;photoemulsion;stencil; 苯乙烯基吡啶盐;感光胶;模版;
