查询词典 amides

Thirdly,in the view of some different results between the reaction of complexes(2)、(3)and[(Me_3Si)_2N]_3LnLi_3 with aromatic aldehydes, the reaction of 2 equiv of aromatic aldehydes with 1 equiv of lithium amide(1) catalyzed by the YCl_3 was subsequently studied,and better yields of the corresponding amides and alcohols can be isolated.These results indicated that the enolate ligand in complexes(2)、(3)may have impact on the Cannizzaro disproportionation reaction.

第三，鉴于上述配合物2、3和[(Me_3Si_2)2_N]_3LnLi_3与芳香醛反应结果上的一些差别，我们又以三氯化钇为催化剂，将两当量的芳香醛与一当量化合物1的锂盐直接进行反应，结果以较好的产率得到了相应的酰胺和醇，这说明配合物2、3中所含的乙烯醇基可能对此Cannizzaro-型歧化反应存在一定的影响。

In the forth part, the heterotactic enthalpic pairwise interaction coefficients between five amides and butanediol isomers (1,3-butanediol, 1,4-butanediol and 2,3-butanediol) at 310.15K are discussed. The change of temperature made remarkable effects on the values of h_.

第四部分：经测定得到了五种酰胺与丁二醇的三种异构体在298.15K(25℃)时的各级异系焓相互作用系数，并进行了分析比较，讨论了五种乙酰胺分子与三种丁二醇分子的相互作用机制。

Methods The amides were prepared from tryptophan and different acid t1erivaties by the catalytic dehydration of dicyclohexyl carbodiimide. The characteristic heterocyclic ring system of 5-(3'-indolyl)-oxazoles was constructed by oxidative cyclization of amide, using dicholorodicyanoquinone.

以色氨酸为原料，与取代的苯甲酸在DCC催化下脱水缩合得到酰胺，再通过DDQ芐位氧化和分子内环合件成5-（3'-吲哚基）-恶唑。

Originally limited to dialkylamino methylenation, the application of Mannich reaction has been expanded much further in recent years to a wide variety of monosubstituted amines, amine equivalents and amides. In addition, a variety of Aza-Mannich and Mannich-Michael methodologies have emerged.

最初该反应的应用范围仅局限于二烷基胺亚甲基化反应，近年来才得到了长足的发展，其研究范围扩展到单取代的胺、胺的类似物以及酰胺等化合物，并发展形成Aza-Mannich和Mannich-Michael等复合Mannich反应。

Carboxylic acid amidechemicals are a kind of novel systemic fungicide with satisfied activity against disease caused by oomycete pathogens.

中文摘要：羧酸酰胺类（Carboxylic acid amides， CAAs）化合物是一类对卵菌病害具有优异防治效果的新型杀菌剂。

For very long time, many research groups focus on using more than a stoichiometric amount of a chiral auxiliaries to obtain high enantioselectivity. There were mainly two sorts of processes reported on highly catalytic asymmetric addition of Grignard reagents to aldehydes. The former case was to transform Grignard reagent RMgX into other organometal reagents such as R_2Zn and R-Ti derivatives via complicated procedures at extremely low temperature. The later case was to link a chiral ligand to Mg in the form of organomagnesium amides or use chiral amine ligand catalyzing the alkylation of aldehydes.

格氏试剂对醛的不对称加成的报道大多需要大量的手性助剂以获得高的光学活性，而高度催化的格氏试剂对醛的不对称加成主要通过两种途径进行：一种是把格氏试剂转化成其他的有机金属试剂如R_2Zn和R-Ti化合物再对醛进行加成，反应通常在低温下进行；另一种是利用手性镁胺作为中间体或直接用手性胺催化来完成此反应。

To improve the yield of an Amide-type Tripodal Ligand and investigate its coordination with rare earth ion under mild condition,a series of Amide-type Tripodal Ligands(L1—L4) have been prepared by the reactions of nitrilotriacetic acid and oxalyl chloride with four kinds of amides,respectively.

为了提高酰胺型三脚架型配体的产率，进一步研究其与稀土离子的配位形式及配合物的荧光性能，以氨三乙酸为母体，草酰氯为氯化试剂，与4种胺在较温和的条件下合成了具有三脚架型结构的配体(L1—L4)，并考察了实验条件、反应温度、反应体系溶剂、缚酸剂、反应时间及催化剂对反应产率的影响。

Kinetic spectrophotometric method for the determinationof trace nitrilotriacetic acid;2. To improve the yield of an Amide-type Tripodal Ligand and investigate its coordination with rare earth ion under mild condition,a series of Amide-type Tripodal Ligands(L1—L4) have been prepared by the reactions of nitrilotriacetic acid and oxalyl chloride with four kinds of amides,respectively.

为了提高酰胺型三脚架型配体的产率，进一步研究其与稀土离子的配位形式及配合物的荧光性能，以氨三乙酸为母体，草酰氯为氯化试剂，与4种胺在较温和的条件下合成了具有三脚架型结构的配体(L1—L4)，并考察了实验条件、反应温度、反应体系溶剂、缚酸剂、反应时间及催化剂对反应产率的影响。

Starting from chiral proline, pipecolinic acid, piperazine-2-carboxylic acid and 1,2-diphenyl amino alcohol, a series of structurally simple and easily prepared amides were developed as highly effective Lewis basic organocatalysts for the asymmetric reduction of imines with trichlorosilane as the reducing agent, which promoted the reduction of N-aryl imines with high yields and excellent enantioselectivities with an unprecedented substrate spectrum.

本文分别由手性脯氨酸、哌啶酸、哌嗪酸以及氨基醇出发，设计和合成了一系列结构新颖、合成简便、性能优良的酰胺类有机小分子路易斯碱催化剂，以廉价的三氯氢硅为氢源，用这些催化剂催化亚胺不对称还原，得到了非常优良的收率、对映选择性和前所未有的底物普适性。

The interfacial bonding between a series of bonding agents including polyhydroxy alcohols bonding agents (LBA-22,LBA-201,hyantoin/triazines composite bonding agents,neutral polymeric bonding agents and substituted amides and RDX were studied. Meanwhile,all of the bonding agents were used to prepare RDX-CMDB propellants.

研究了多羟基醇类(LBA-22、LBA-201)、海因/三嗪类、中性聚合物类和取代酰胺类键合剂与RDX的表界面作用，并在RDX-CMDB推进剂中考察了这些键合剂的作用效果。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。