Substituent effect是什么意思

网络释义

用法例句

A novel second-order nonlinear optical chromophore(DCDHF-2-V) was synthesized from 3-Hydroxy-3-methyl-2-butanae,propanedinitrile and 4-diethylaminobenzaldehyde by aldol condensation reaction.

用3-羟基-3-甲基-2-丁酮、丙二腈和N,N-二乙基对苯甲醛,经羟醛缩合反应制备了一种新型有机小分子二阶非线性光学(NLD)材料DCDHF-2-V。

The prospect of the catalysts for aldol condensation is also been put forward.

羟醛缩合可以形成新的碳-碳键,增长碳链,是一类重要的有机反应。

Then TiCl_4 with different tertiary amines was applied as catalyst to the intramolecular ring closing aldol condensation of 2,15-hexadecanedion to give dehydrogenated muscone,and the ratio of E/Z isomers was determined.

然后以TiC l4与不同的叔胺为催化剂,对2,15-十六二酮进行分子内羟醛缩合关环反应,成功合成了脱氢麝香酮,并确定了顺反异构的比例,实验表明,以TiC l4-i-Pr2NEt为关环催化剂环合收率为79。

The enantiomer of (-)-α-conidendrin was synthesized by utilizing the asymmetric aldol reaction of chiral N-acyloxazolidinone catalyzed by magnesium chloride in the presence of Et3N and chlorotrimethylsilane as the key step.

在三乙胺和三甲基氯化硅存在下,以氯化镁催化的4S-4-苄基-戊烯酰基-2-噁唑烷酮的Evans羟醛反应为关键步骤合成了(-)-α-铁杉脂素对映体,其结构经1HNMR,13CNMR,EI-MS和HR-EI确定。