查询词典 cyano-ethylene

RESULTS Pyr column coupled with Cyano column was more suitable for seperation.

柱串联，夏天无中原阿片碱和延胡索乙素能较好地分离。

Containing cyano groups in bridge vinylene instead of phenyl rings showed especial stability and 7 containing methoxy groups in thecentral phenyl ring showed significant instability.

这说明除了取代基引起的电子效应外，取代基位置和空间效应也是影响M-PPV稳定性的重要因素。

Based on our early work, we will discuss the coupling the reaction of α-cyano ketenedithioacetals with Baylis-Hillman adducts.

基于以上的研究，本文着重讨论了α-氰基二硫缩烯酮与Baylis-Hillman加成产物的偶联反应。

The latter is chlorinated in the side chains under free-radical conditions to give 2,4-dichloro-5-fluoro-3-dichloromethyl-1-trichloromethylbenzene. The latter is hydrolysed via 2,4-dichloro-5-fluoro-3-dichloromethylbenzoic acid, which can be isolated if necessary, to give 2,4-dichloro-5-fluoro-3-formyl-benzoic acid, the aldehyde group of which is reacted to give 2,4-dichloro-5-fluoro-3-N-hydroxyiminomethyl-benzoic acid, from which, with simultaneous conversion of the carboxyl group into the chlorocarbonyl group, water is eliminated using an acid chloride to give the nitrile 2,4-dichloro-3-cyano-5-fluoro-benzoyl chloride.

随后，在游离基条件下进行侧链的氯化，得到2，4-二氯-5-氟-3-二氯甲基-1-三氯甲基苯、后者被水解，经过2，4-二氯-5-氟-3-二氯甲基苯甲酸(如果需要此化合物可以分离)，得到2，4-二氯-5-氟-3-甲酰苯甲酸，将其醛基反应，得到2，4-二氯-5-氟-3-N-羟基亚氨基甲基苯甲酸，用酰氯从其中除去水，同时将羧基转化为碳酰氯，得到一种腈，即2，4-二氯-3-氰基-5-氯-苯甲酰氯。

The "one-pot" synthetic reaction of 2-alkylthio-4-amino-5-cyano-6-methylthiopyrimidines from bis(methylthi-o)methylene propanedinitrile was perfected and the average yield was increased to above 70% in the present of KF/Al2O3 The problem that the amino group of above mention- ed pyrimidine compounds were hard to be acylated by trichloroacetyl chloride and benzoyl chloride was resolved by the use of NaH.

在研究合成方法的过程中，论文对KF/Al2O3催化合成本文嘧啶化合物4的&一锅煮&方法进行了完善和改进，扩大了&一锅煮&法的应用范围，可以直接使用硫酸酯、卤代烷、对甲苯磺酸酯进行合成，平均产率达到70%以上。

A novel method for synthesis of-4-cyano-3-hydroxybutyric acid ethyl ester (1), a key intermediate of statins, was reported.

研究了一条新的路线用于他汀类药物的重要中间体-4-氰基-3-羟基丁酸乙酯的合成。

These substituents are either small groups such as phenoxy groups,aryls,cyclic secondary amines,cyano groups,and halogens or large functional moieties such as PDI,Phthalocyanines, porphyrins,BODIPY,cyclodextrin,Fullerene,calixarene,and so on.

这在过去的工作中，人们把一些小分子的，如酚氧基、仲胺基、苯基、氰基以及卤素氟、氯、引入到PDI中，同时也把一些较大功能团，如PDI本身、卟啉、酞菁、环糊精、BODIPY、杯芳烃、富勒烯等和PDI连接在一起。

The traditional method to determine cyano cobalamin by HPLC cannot be used for rapid determination of vitamin B 12 in fermentation broth.

文中探索了一种不经氰化物转化而直接使用HPLC测定发酵液中维生素B12 (包括羟基钴胺素、脱氧腺苷钴胺素和甲基钴胺素)的检测方法。

The oxygen consumption with the substrates of succinate in RTT significantly decreased by 34％ as compared with that in control. RTT cybrids produced more oxygen radicals than that of control cybrids as measured by anti-cyano-respiration that reflects the production of oxygen free radicals in mitochondrial respiratory chain. RTT cybrid cell lines demonstrated an increased sensitivity to 〓-induced apoptosis as compared to control cybrids.

以琥珀酸为底物时患儿组融合细胞线粒体呼吸氧耗率显著降低，较正常对照组降低34％；患儿融合细胞线粒体呼吸链氧自由基水平增高，对〓刺激的凋亡易感性增高。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。