酰化

Microcalorimetric measurements of NH~3 adsorption on catalysts reveal that the remarkable strong acidity and catalytic activity of the Al- promoted catalysts are caused by a change of distribution of acid site strengths and an enhancement in the number of strong and intermediate-strong acid sites effective for the n-butane isomerization and benzoylation of toluene.

NH~3吸附微量热结果表明，Al促进样品的强酸性和催化活性的显著提高是由于样品表面的酸位强度分布发生了变化，有利于正丁烷异构化反应和苯甲酰化反应的中强酸位和强酸位的酸量显著增加。

Starting from 3, 5-dihydroxybenzoic acid, a total of 16 kinds of salicylicaldehyde derivatives have been synthesized by the esterification, substitution, reduction, formylation, condensation, brominate, functional group protection and deprotection reactions, of which 11 have not been reported yet. Enatiomerically pure 2-amino-2'-hydroxy-1, 1'-binaphthyl has been easily obtained from its racemic mixture by the eantioselective formation of inclusion crystals with N-benzylcinchoninium chloride.

树枝状大分子希夫碱三齿手性配体的设计与合成从3，5-二羟基苯甲酸出发，通过酯化、取代、还原、甲酰化、缩合、官能团的保护与去保护等反应合成了四个系列16种水杨醛衍生物，其中11中是未见文献报道的新化合物。

We expounded the N-alkylation, tricholroacetylation and bromination of pyrrole in chapter two.

第二章，论述了吡咯的N-烷基化、三氯乙酰化及溴代反应。

Bromo-2′,4′-dichloroacetophenone was synthesized in three steps,w hich were bromization ,chlorination and acylation,from glacial acetic acid and m -dichlorobenzene.

以冰乙酸和间二氯苯为原料，经溴化、氯化、酰化三个步骤，制得 2—溴- 2′，4′-二氯苯乙酮，产率达 70 %。

The demethylation of DNA and acetylation of core histone reconstitute chromosome struction which is beneficial to gene transcription.

DNA去甲基化与组蛋白乙酰化导致染色质构象发生有利于基因转录的变化，基因具有转录活性。

This result provided the reference for adjusting dosage regimen of the drug subjected to the metabolism of demethylation and acetylation for clinic.

可为临床调整经去甲基化、乙酰化代谢药物的用药方案提供参考依据。

We have investigated whether the combination of decitabine and a clinically relevant inhibitor of histone deacetylase activity (belinostat, PXD101) can further increase the re-expression of genes epigenetically silenced by DNA methylation and enhance chemo-sensitisation in vivo at well-tolerated doses.

我们研究了地西他滨联合组蛋白去乙酰化酶抑制剂（belinostat，PXD101）是否可以进一步增加DNA甲基化后生沉默基因的重新表达，在耐受性良好的剂量下增加化疗敏感性。

Four new salicylaldehyde derivatives with a glucose or mannose moiety were synthesized with 2-tert-butylphenol or 4-tert-butylphenol as the starting material, followed by the formylation, chloromethylation, nucleophilic substitution reaction with the desired carbohydrate. The salicylaldehyde derivatives condensed with ethylenediamine to give the Schiff bases, which coordinated with Mn to afford four novel sugar-based Salen Mn complexes.

首先，分别以2-叔丁基苯酚和4-叔丁基苯酚为起始原料，经过甲酰化反应、氯甲基化反应、和糖类衍生物的亲核取代反应制得了四种新型并入葡萄糖基或甘露糖基的水杨醛衍生物，将它们与乙二胺缩合生成希夫碱配体，得到的配体与过渡金属Mn~(3+)配位制备出四种新型含糖基的Salen Mn配合物。

Hexene ; hydroformylation ; rhodium ; supported catalyst ; organic phosphine ; organic-inorganic hybrid

己烯；氢甲酰化；铑；负载型催化剂；有机膦；有机-无机杂化

Propargyl alcohol was protected by dihydrophran with the catalysis of PPTS ,and then reacted with Ethyl Mag bromide to prepare its corresponding Grignard reagent.

炔丙醇在 PPTS 催化下由二氢吡喃保护，与溴乙烷格氏试剂反应生成相应的格氏试剂，然后与氯甲酸甲酯反应得到羟基丁炔酸甲酯四氢吡喃醚，在 PPTS 催化下脱保护后进行甲磺酰化，由溴化钠进行溴取代后合成了4-溴-2-丁炔酸甲酯，总收率达53%。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。