It represents an example of a heterocycle being formed as transient species.
它仍然是在反应中生成过渡状态的杂环的实例.
The reduced heterocycle 46 conveniently separates out during the reaction.
在反应过程中被还原的杂环(46)可以方便地分离出来.
The aziridinium ions must all be opened by a concerted process.
亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.
The diazirines are interesting , highly strained ring systems.
偶氮杂环丙烷是一类重要的 、 环内张力颇大的化合物.
The latter arises from abstraction of the somewhat lesser activated C - H bond in the dioxolane.
后者是由二氧杂环戊烷中活化较弱的C -H 键离解而产生的.
A number of recent variations have further demonstrated the utility of the 1, 3 - dithiane system.
几种最近的变体进一步阐明了1, 3- 二硫杂环已烷体系的用途.
We have, therefore , in both of the examples above, heterocyclic compounds with " built - in " or latent functionality.
上述两例中的杂环化合物,都具有 “ 固有的 ” 或潜在的官能基.
Heterocycles have been passed over in large part by chemists confronted with synthetic problems.
杂环化合物常被许多从事合成研究的化学家所忽视.
Morphine: Heterocyclic compound, narcotic analgesic alkaloid originally isolated from opium.
吗啡: 杂环化合物, 从鸦片分离出的麻醉性镇痛药镇痛药生物碱.
The addition reaction of 1 , 3,2 - benzodiazaphosphorin - 4 ( 1 H ) - one 2 oxides with has been studied.
本文研究了2,4-二 氧 代-1,3,2-苯并二氮磷杂环己烷的磷氢键对β - 硝基苯乙烯、丙烯酸酯 、 丙烯 腈 及二硫化碳的加成反应,共合成了18个新的加成产物.
Aim To study on synthesis and antibacterial activity evaluation of polyheterocycles.
目的研究多杂环化合物的合成方法和抗菌活性.
HH - 3 S is a heterocyclic compound, transparent acidic fluid.
HH-3S是一种杂环化合物 、 透明酸性液体.
New , sterically demanding 1, 3 - dialkylimidazolinium salts used as N - heterocyclic carbene precursors were synthesized and characterized.
合成并表征了一种新型的有空间需求的N - 杂环卡宾前驱体1, 3- 二烷基咪唑啉盐.
Ring - opening of two types of N - tosyl aziridines with hydroxyl compounds has been studied.
本文研究了羟基化合物对两种类型N - 对甲苯磺酰基氮杂环丙烷的开环反应.
Such a helerocycle is found in pyrylium salts.
吡喃盐就是这类的杂环.