区域选择性

其次，详细的介绍了钯/碳催化的使用炔丙基化合物高区域选择性的合成茚的衍生物的方法。

And then , a novel Pd / C-catalyzed reaction for the synthesis of indene derivatives from propargylic compounds with high regioselectivity was described in detail .

在蔗糖酯合成工艺的研究中，生物催化合成法因其温和的反应条件和高度的区域选择性而备受关注。

In the study of the synthesis of sucrose esters , more research was focus on the biocatalyst synthesis because of its mild reaction condition and high regioselectivity .

本文主要工作是找到富勒烯化学修饰的三种新方法，合成了几类新型的富勒烯衍生物以及研究了C（70）单加成反应的区域选择性。

In this dissertation , we synthesized three types of new fullerene derivatives and investigated the regioselectivity of the mono-addition reactions of C_ ( 70 ) .

2-甲硫基-7（5）-取代-3-吡唑并[1,5-a]嘧啶甲酸乙酯的区域选择性合成与2DNMR研究

Regioselective Synthesis and 2D NMR Research of Ethyl 2-Methylthio-7 ( 5 ) - substituted Pyrazolo [ 1,5-a ] pyrimidine-3-carboxylate

用ABINITIO方法在MP2/6-31G水平上研究了C，N-二甲基硝酮与丙烯的1,3-偶极环加成反应历程及区域选择性。

The 1,3-dipolar cycloaddition reaction of C , N-dimethyl nitron with propylene has been calculated at the MP2 / 6-31G level using ab initio molecular orbital theory .

用CNDO／2的结果讨论Diels&Alder反应的区域选择性

Discuss the Area Selection of Diels-Alder According to the Results of CNDO / 2

目的评估声门上型喉癌N1、N2期行区域选择性颈廓清术的疗效。

Objective To estimate the cure effect of region-selectivity neck dissection in supraglottic larynx cancer ( N1 ? N2 ) .

用前线分子轨道（FMO）理论可以说明上述反应的区域选择性与位置选择性。

The regioselectivity and site selectivity of above cycloadditions can be elucidated by FMO theory .

造成这种现象的一个很重要的原因是传统Fischer吲哚合成法以非对称的酮作为底物时存在的区域选择性问题。

One of the main reasons is the lack of regioselectivity in the traditional Fischer indole synthesis , when unsymmetrical ketones are taken as substrates .

PdCl2-NiCl2-PPh3/PVP催化苯乙烯高区域选择性的氢酯化反应

Regioselective Hydroesterification of Styrene Catalyzed by PdCl_2-NiCl_2-PPh_3 / PVP

考察了嘌呤环上的取代基及糖环上的2′-取代基对PEL催化嘌呤类核苷区域选择性酰化反应的影响规律。

The effects of the substituents in purine moiety and2 ' - substituents in sugar moiety on PEL-catalyzed regioselective acylation of purine nucleosides were studied .

固体超强酸ZrO2-TiO2/SO4~（2-）催化下甲苯的区域选择性硝化

Regioselective Nitration of Toluene with Nitric Acid in the Presence of Solid Super Strong Acid ZrO_2-TiO_2 / SO_4 ~ ( 2 - ) Catalysts

随着P-B反应在有机合成中越来越广泛的应用，人们对P-B反应的区域选择性的研究也越来越深入。

With the more and more applications in organic synthesis of the P-B reaction , its regioselectivity has attracted more and more attention .

实验结果表明，上述加成反应具有很高的化学选择性和区域选择性，只得到相应的Markovnikov加成产物。

The above experimental results revealed that the addition reactions proceeded in a highly chemo - and regioselective manner , and afford the corresponding Markovnikov addition products .

结果全部病例均手术切除，无手术死亡，术中平均出血量1480ml（450~4200ml），12例施行第1肝门阻断，10例采用了肝门区域选择性血管阻断，手术时间平均195min。

The mean intraoperative blood loss was 1480 ml ( 450 ml-4200 ml ) . The blocking of the first hepatic portal was performed in 12 cases , the selective blocking of regional blood vessels in hepatic portals in 10.The mean duration of operation was 195 min.

固体酸催化剂上芳香族化合物区域选择性硝化反应研究

Study on Regioselective Nitration of Aromatic Compounds on Solid Acid Catalysts

立体选择性和区域选择性地合成共轭二烯是有机合成中十分有意义的研究课题。

Highly stereoselective syntheses of conjugated alkadiene are important subject .

焦脱镁叶绿酸-a甲酯的芳香性和亲电反应的区域选择性

Aromaticity and District Selectivity in Electrophilic Reaction of Methyl Pyropheophorbide-a

N-4-戊烯基硝酮分子内环加成反应区域选择性的理论研究

Theoretical Study on the Regioselectivity of Intramolecular N-4 - pentenyl Nitrone Cycloaddition

乙酰丙酸乙酯和芳醛加成反应区域选择性的研究

The Regioselective Study of Ethyl Levulinate and Benzaldehyde 's Nucleophilic Addition Reaction

论区域选择性联锁提高供电系统可靠性

Upgrading Reliability of Network Power Supply with Selective Area Interlock

探讨了不同的钯化合物的区域选择性和催化作用。

Regio selectivity and catalytic effect of different palladium compounds were discussed .

氧化腈与丙炔1,3-偶极环加成反应中区域选择性的理论研究

Theoretical Study on the Regioselectivity of Nitrile Oxide 1,3-Dipolar Cycloaddition to Propyne

非对称氮杂环丙烷的亲核开环反应及其区域选择性

Nucleophilic Ring Opening Reaction of Unsymmetric Aziridines and Its Regioselectivity

己内酰胺三氟甲磺酸离子液体中甲苯的区域选择性硝化

Regioselective Nitration of Toluene in Ionic Liquid Caprolactam-trifluoromethanesulfonic Acid

反应条件温和、步骤简单、原子经济且环境友好、区域选择性高。

This transformation features with step-and atom-economic , environmentally friendly and highly region-selective .

洛索洛芬钠合成工艺研究Ⅱ.高区域选择性烷基化合成法

Synthesis of Loxoprofen Sodium ⅱ . Highly Regioselective Alkylation

该反应不仅具有区域选择性，对环烯还有很好的立体选择性。

The reaction presented not only regio-selectivity , but also stereoselectivity for cycloalkenes .

蔗糖酯的酶催化区域选择性合成

Enzyme - Catalyzed Regioselective Synthesis of Sucrose Esters

另外，对该反应的区域选择性也进行了研究。

The regioselectivity and diastereoselectivity were also studied .