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cyclic group相关的网络例句

查询词典 cyclic group

与 cyclic group 相关的网络例句 [注:此内容来源于网络,仅供参考]

In the presence of catalytic rhodium acetate, ethyl 2-diazo-3-oxo-per fluoroalkanoates, reacted readily with nitriles to give a series of 5-fluoroalkyl substituted 1, 3oxazoles with high regio-selectivity through a metal carbenoid intermediate. The reactions of carbenoids with noncyclic vinyl ethers or cyclic vinyl ethers afforded dihydrofuroates in good to excellent yields. Interestingly, only vinyl C-H insertion compound was obtained concerning of the reaction of carbenoids with 2, 5dimethylfuran due to the steric hindrance of methyl group

醋酸铑分解2-重氮-3-氧代-全氟羧酸乙酯形成的金属卡宾作为1,3-偶极体,可以与一系列芳基或烷基取代的腈反应,高度区域选择性地生成一系列4-乙氧羰基-5-氟烷基取代的噁唑化合物;也可以与富电子的链状和环状的烯基醚反应,以优良的产率得到一系列氟烷基取代的二氢呋喃类化合物;而与2,5-二甲基呋喃的反应,由于甲基的位阻作用,只得到金属卡宾对呋喃3-位烯基碳氢键插入产物。

Hemes are cyclic tetrapyrroles that contain iron and commonly found as the prosthetic group of hemoglobin , myoglobin and the cytochromes .

血红素是含铁的环状四吡咯,它作为辅基,普遍存在于血红蛋白肌红蛋白和细胞色素中。

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推荐网络例句

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。