查询词典 alkaloids

If all of the bark of Cinchona alkaloids using a general approach to be invaded more than five hours, the use of ultrasonic dispersion as long as half an hour to complete.

如金鸡纳树皮中全部生物碱用一般方法侵出需5小时以上，采用超声分散只要半小时即可完成。

AIM: To synthesize 2 novel chiral ligands derived from cinchona alkaloids and study their catalytic performance in asymmetric dihydroxylation of 5 olefins.

目的：合成两种新的金鸡纳生物碱类衍生物配体并将其用于催化五种烯烃的不对称二羟化反应，考察催化效果。

These have attracted wide interest in the last years because it represents a key intermediate of the synthesis of Cinchona alkaloids ; such as quinine and cinchonamine.

由於它们为许多重要且具有药效的金鸡钠生物碱，如奎宁和金鸡钠胺，合成时之关键中间物或先驱物，使得在最近几年来引发广泛的研究兴趣。

"Cinchona:any of several trees and shrubs of the genus Cinchona, native chiefly to the andes and cultivated for bark that yields the medicinal alkaloids quinine and quinidine, which are used to treat malaria."

金鸡纳树：一种金鸡纳属的树木和灌木，原产于安第斯山区，其树皮含有治疗疟疾的药用生物碱奎宁和奎尼定，因而被栽植。

Any of several trees and shrubs of the genus Cinchona, native chiefly to the Andes and cultivated for bark that yields the medicinal alkaloids quinine and quinidine, which are used to treat malaria.

金鸡纳树一种金鸡纳属的树木和灌木，原产于安第斯山区，其树皮含有治疗疟疾的药用生物碱奎宁和奎尼定，因而被栽植

The reported organocatalyst for asymmetric Michael additions include proline and its derivatives, chiral imidazolidinone derivatives, chiral urea, cinchona alkaloids and so on.

目前报道的催化Michael加成反应的有机催化剂主要有脯氨酸及其衍生物、手性咪唑啉酮、手性脲、金鸡纳碱衍生物等。

CH2Cl2 was a proper solvent for most of free cinchona alkaloids to achieve higher enantioselectivities, while THF was a better solvent for all the 1,4-dichlorophthalazine derivatives.

使用5mol%的催化剂获得了最佳的反应结果，3mol%的用量使ee值降低了5%，1mol%的用量则降低15%，但是当催化剂增至10mol%或20mol%，ee值也没有提高。

The thermodynamic parameters in the separation of enantiomers of amino acid derivatives and diastereomers of cinchona alkaloids were calculated and the dissociation constants of cinchonine and cinchonidine on the cinchonine imprinted monolithic disk were determined by frontal analysis.

计算了氨基酸衍生物对映体以及辛可纳非对映异构体分离过程的热力学参数并利用前沿色谱法测定了辛可宁和辛可尼丁在盘状分子印迹整体柱上的离解平衡常数。

Nsted acids, chiral primary amines, cinchona alkaloids, etc.

nsted酸、手性伯胺、金鸡纳碱衍生物等。

The reported organocatalyst for asymmetric Mannich reaction include proline derivatives, chiral phosphoric acids, chiralurea derivatives, cinchona alkaloids and so on, which can catalyze the asymmetric Mannich reaction with high catalytic activity and excellent enantiselectivity.

本文评述了各类有机催化剂在有机催化不对称Mannich 反应中的应用研究进展，以及不对称诱导反应的机理、催化剂分子结构及反应条件对其催化活性和不对称诱导作用的影响。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。