反应率

Reaction (1) was examined with different kinds of acetal substrate(1) and vinyl ethyl ether, and the results indicated that the 1, 1,3-triethoxy compounds could be obtained in high yields of 88 and 97% respectively when the R groups of the acetal are phenyl and anisyl, while the yields amounted only to 55-75 % for R=a...

有证据表明这种催化反应也可能是通过正碳离子中间体进行的。本反应的产物1，1，3-三乙氧基化合物经乙酸/乙酸钠溶液水解可得反式α，β-不饱和醛。水解产率：芳香族产物大于90%，脂肪族产物大于75%。

The ionic liquid [C_(12H_(25)_2-bim]Br was used as catalyst in the reaction of synthesizing the derivatives of benzil from aromatic aldehydes, which showed better catalytic effect, mild reaction conditions and higher yield.

利用合成的离子液体[C_(12H_(25)_2-bim]Br做催化剂，催化由芳醛合成偶酰的反应，催化效果较好，反应条件温和，产率较高。

Seven Schiff bases of N-(4-hydroxyphenylmethylene)-1-naphthylamine, N-(4-hydroxyphenylmethylene)-p-methoxyaniline, N-(4-hydroxyphenylmethylene)-benzylamine, N-(4-hydroxy-3-methoxyphenylmethylene) furfurylamine, N-(4-hydroxy-3-methoxyphenyl methylene)-p-methylaniline, N-(4-hydroxy-3-methoxyphenylmethylene)-p-methoxyaniline and N-salicylidene-4-aminoantipyrine were first synthesized by the one step solid phase reactions between aromatic aldehydes with phenolic hydroxyl and amines at room temperature without solvent.

分别以带酚羟基的芳醛与胺类反应，首次通过室温固相反应一步合成了N-（4-羟基苯基亚甲基）-1-萘胺、N-（4-羟基苯基亚甲基）-对甲氧基苯胺、N-（4-羟基苯基亚甲基）-苄胺、N-（4-羟基-3-甲氧基苯基亚甲基）糠胺、N-（4-羟基-3-甲氧基苯基亚甲基）-对甲苯胺、N-（4-羟基-3-甲氧基苯基亚甲基）-对甲氧基苯胺和N-亚水杨基-4-氨基安替比林7种Schiff碱，反应15min完成，产率均超过90％。

A series of liquid crystals containing naphthalene 1~13 was synthesized by the reaction of carbonyl compound with Grignard reagent and coupling reaction between phenyl boronic acid and halogen naphthalene .

经羰基化合物与格氏试剂反应及芳基硼酸与萘基卤化物偶联反应合成了系列含萘环骨架液晶化合物1~13；产率在73%~759%。

H-Tyr-OH was then react with fluorenylmethyl chloroformate in dioxane or THF to give N-Fluorenylmethoxycarbonyl-O-benzyltyosine Fmoc-Tyr(Bzl-OH in 98% yield.

酪氨酸苄醚与芴甲氧羰基氯(Fmoc-C1)反应，成功地在氨基上导入了芴甲氧羰基保护基，反应在二氧六环或四氢呋喃中进行，产率达到98%。

In addition, the activties of different catalyst were compered. The test proved the chloroplatinic acid– ethanol catalyst provides high yields of addition products without the formation of undesirable by-products, to provide the possibility of using less rigorous reaction condition, to provide a catalyst material, which is effective at low concentrations.

实验过程中特别对不同催化剂进行了比较，其中氯铂酸—乙醇催化剂提高了加成反应的产率，没有副产物生成，不需要苛刻的反应条件，在低浓度时有很好的催化效果。

Knoevenagel condensation reaction between aromatic aldehyde, malononitrile or ethyl cyanoacetate is promoted by organocatalyst N-methylimidazole.

以1-甲基咪唑为有机小分子催化剂催化芳香醛与丙二腈或氰乙酸乙酯的Knoevenagel缩合反应，反应速度快，操作方便，产率高，后处理简单。

Photoinduced Electron Transfer [2+2] Cycloaddition Reactions ofBenzannelated Isoquinolin-1-ones with Electron Deficient Alkenes Photoinduced [2+2] cycloaddition reactions of 11H-benzoxazolo[3,2-b]isoquinolin-11-one 8 and 11H-benzothiazolo[3,2-b]isoquinolin-11-one 13 with electron deficient alkenessuch as acrylonitrile, methyl acrylate, dimethyl fumarate and dimethyl maleate afforded a group of polycyclic isoquinoline derivatives bearing cyclobutane moieties ingood to excellent yields and resulted in the Schenck isomerization of the alkenes.

3苯并增环异喹啉-1-酮与缺电子烯烃的光诱导电子转移[2+2]环加成反应 11H-苯并恶唑[3，2-b]异喹啉-11-酮8和11H-苯并噻唑[3，2-b]异喹啉-11-酮13与缺电子烯烃如丙烯腈，丙烯酸甲酯，富马酸二甲酯及马来酸二甲酯的光诱导[2+2]环加成反应以高产率给出一系列含有环丁烷结构单元的多环异喹啉衍生物并导致烯烃的Schenck异构化作用。

The Gemini phosphate surfactant was synthesized with decyl digomeric glycol and phosphatizing agent P205 by phosphatizing.

实验选择苄基三乙基氯化铵为催化剂，用量为4%，投料比为2：1，反应温度为60℃，反应时间为6时，最终产率为78.3%。

In the second part of this thesis, a formal [2+2] cycloaddition ketenes and dialkyl azodicarboxylates was studied. We found that by adjusting the substituents in the diazenes, the reaction mode can be completely switched, and furnish four-membered-ring products, aza-b-lactams, the enantioselectivity was up to 91%.

经研究发现，通过对偶氮化合物取代基团的改变，我们可以实现[4+2]环加成反应到[2+2]环加成反应的转变，在手性氮杂环卡宾的作用下，对具有各种取代基的烯酮都可以很好的产率得到氮杂b-内酰胺，其对映选择性最高可以达到91%。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！