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- Alkylation of ambident nucleophiles different places by using phase-transfer catalytic agent were studied in this paper. 本文研究了在相转移催化条件下对两可亲核试剂不同位置的烷基化反应。
- Study on under phase-transfer catalytic conditions ambident nucleophiles alkylation reaction 相转移催化条件下的两可亲核试剂烷基化反应的研究
- Effects of Ambident Nucleophiles in the Nucleophilic Substitution Reaction 两可亲核试剂在亲核取代反应中的作用
- ambident nucleophiles 两可亲核试剂
- Keywords ambident nucleophiles;solvent effect;nucleophilic substitution reaction;alkyl outcome; 两可亲核试剂;溶剂效应;亲核取代反应;烷基化产物;
- Keywords Ambident nucleophilic reagents;nucleophilic substitution reation; 两可亲核试剂;亲核取代反应;
- A variety of nucleophiles have been employed successfully in these reactions. 多种亲核试剂都已成功应用于此类反应。
- The nucleophiles include alkene, alkyne, alcohol, acid, amine, water, etc. 亲核试剂包括烯烃、炔烃、醇、酸、胺、水等。
- The most general means of generating carban nucleophiles involves removal of a proton from a carbon. 从碳原子上移走一质子,是产生亲核性碳的最普通手段。
- Reactions of Carbonyl Compounds with the Carbonyl Group as an Electrophile with H, C, N and O Nucleophiles. 作为亲电基的碳基与作为亲核基的H,C,N和O的羰基化合物反应。
- Alcohols as Nucleophiles (Formation of Alkoxides) and Electrophiles (Formation of Osylates). 醇作为亲核基(烷氧基化合物的形成)和醇作为亲电基(佯盐的形成)。
- Other nucleophiles such as C_6H_5S~-, RCO_2~- (B. = CH_3, CF_3) reacted with 1 giving only the products of S-O bond cleavage. 其它亲核试剂如RCO_2~-、ArS~-等却只进攻1的硫原子.
- In the Lewis electron theory (see acid-base theory), advanced by Gilbert N.Lewis in 1923, nucleophiles are by definition Lewis bases. 在1923年由路易斯提出的电子理论中(参阅acid-base theory),亲核试剂是由路易斯定义的。
- This thesis focuses on ring-opening reactions of aziridines with various nucleophiles catalyzed by organocatalysts or Lewis acids. 本论文主要研究了氮杂环丙烷化合物的若干转化反应,侧重于有机小分子催化下各类亲核试剂对之的开环反应研究。
- Firstly, we studied the ring-opening reactions of aziridines with nucleophiles, such as thiols, amines, utilizing small molecules as organocatalysts. 首先,我们研究了有机小分子催化下不同亲核试剂,如硫酚,胺等与氮杂环丙烷化合物的开环反应。
- We discovered that various nucleophiles could react with aziridines in the presence of tertiary amines, in which DABCO is the most efficient catalyst. 在亲核试剂对氮杂环丙烷开环反应的研究中,我们发现三级胺能作为一种有机催化剂,有效催化此类反应的进行,经过实验的探索和研究,我们发现在各种三级胺中,DABCO最优。
- There were few successful examples of regioselectivity in reactions of unsymmetrically allylic derivatives, and enantioselectivities obtained with prochiral nucleophiles. 因而我们选用反应机理相对比较清楚的钯催化烯丙基取代反应来研究平面手性的作用。
- MASKIEWICZ R,SOGAH D,BRUICE T C.Chemiluminescence reactions of lucigenin.2.Reactions of lucigenin with hydroxide ion and other nucleophiles[J],J Am chem soc,1979,101(18):5355. 张学军;刘链;司传平.;活性氧清除剂和钙离子通道阻断剂对人淋巴细胞化学发光的效应[J]
- Unlike neutral C60, which is an electron-deficient molecule and reactive towards nucleophiles, C60 anions are electron-rich species and reactive towards electrophiles. 摘要中性的C60是很强的缺电子体,主要和亲核试剂进行化学反应。
- Unlike neutral C60,which is an electron-deficient molecule and reactive towards nucleophiles,C60 anions are electron-rich species and reactive towards electrophiles. 与之不同的是C60经还原生成负离子后,由缺电子变为富含电子,具有很强的亲核性质,可与亲电试剂进行反应。