查询词典 heck

In addition, the Heck reaction of bromobenzene with styrene of a wide range of substrates was also achieved.

在催化纯水中的Heck反应时，合适的表面活性剂也使得该类环钯化合物表现出一定的催化效果。

The catalytic performance for the Heck reactions of various substituted aryl halides with acrylic acid or styrene was studied.

研究了该催化剂对各种取代卤代苯与丙烯酸、苯乙烯的Heck芳基化反应催化性能。

Seven 7-styrylcoumarins were synthesized by palladium-catalyzed Heck reaction of coumarin diazonium salts with substituted styrenes.

采用钯催化香豆素重氮盐的Heck反应合成了七个7-位苯乙烯基取代香豆素化合物，该方法反应条件温和且收率较高。

The applications of ionic liquids in Heck reaction,oxidation,hydroreduction,Friedel-Crafts and halogenation of alcohol were summarized.

综述了离子液体在Heck反应、氧化反应、加氢还原反应、傅-克反应和醇的卤代反应中的应用。

You can say, Where the heck am I?

你能说，heck 是我哪里？

It consists of the following parts:Chapter I: Application of intramolecular Heck reaction in natural products total synthesis.

主要内容包含如下几方面：一、分子内Heck反应在天然产物全合成中的应用。

The major goal for our research is to use simple synthesized method for various fluorescence dye derivatives containing Phenothiazine core via Heck reaction and Suzuki coupling reaction that unprotected at 10N-H.

中文摘要本实验的研究目的为利用简单的合成步骤：在Phenothiazine 的3，7-位置上，藉由Heck reaction和Suzuki coupling reaction直接合成出 10NH没有保护基的萤光染料。

In the study of the Heck reaction in the homogeneous system, a phosphonium salt, PPh_4Br, was used as co-catalyst in the pailadacycle catalyst system for the Heck reaction of the aryl chlorides.

另外，也研究了钴络合物催化卤代烷烃的Heck羰基化反应。

Syntheses of PPVs derivatives containing oxadizole by Heck reaction Chromophore of oxadizole was introduced into the chain of PPVs derivatives with alkoxyl as side-chain by Heck reaction.

二。通过Heck反应在PPV主链结构中引入噁二唑基团通过Heck反应将噁二唑引入了不同烷氧取代的PPV高分子主链，所得高分子在THF、DMF等常见溶剂中有较大的溶解度。

The complex was characterized by FT-IR, XRD, BET, SEM and EDS. The resin-supported catalyst exhibited high catalytic activity in the Heck reaction and could be reused up to 17 times in NMP or 16 times in DMF at 90 ℃ in the Heck reaction of iodobenzene with acrylic acid.

该负载型催化剂对Heck反应表现出高的催化活性和很好的重复使用性能，于90℃的碘苯与丙烯酸的Heck反应中，在NMP溶剂中能重复使用17次，在DMF溶剂中能重复使用16次。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。