查询词典 arsonium

A new method for the direct synthesis of α-acyl methylenetriphenyl-arsoranes from readily available arsonium salts was afforded.

提供了一个由α-位具有强吸电子取代基的鉮盐一步合成α-酰基胂叶立德的新方法。

In this dissertation, we also reported a facile stereoselectivesynthesis of (2E, 4E)-2,4-dienals via arsonium salt.

二在合成研究中，我们还发现利用砷盐由醛一步高度立体选择性合成(2E，4E)-2，4烯醛的简便方法。

These possible mechanisms for the synthetic reaction and thesubstitution reaction of α-hyperiodine group arsonium ylides were proposed.

将它与亲核试剂作用；产生α-硒代或α-硫代胂叶立德，提出了先配位后配体偶联的可能反应机理。

And thus, either one of the two geometrical isomers can be obtainedat will in high yield with high stercoselectivity,Two different stereoselectivities are displayed in thereactions of arsonium and telluronium benzylides with α,β-unsaturated esters and amides.

发现了苄基胂、碲叶立德在与α，β-不饱和酯、酰胺的环丙烷化反应中表现出不同的立体选择性，肉桂基胂、碲叶立德与α，β-不饱和酯反应时亦是如此。

Arsonium ylide ; crystal structure ; dimethyl 2-benzoymethylene-3-triphenylarsylene-succinate

胂叶立德；晶体结构； 2-苯甲酰亚甲基-3-三苯胂叉琥珀酸二甲酯

Carbonyl arsonium ylides, which reacted with almost equimolarphenylselanyl iodide, were conversed into α-phenylseleno arsonium ylides in thepresence of triethylamine, affording a new method for the synthesis of α-phenylseleno arsonium ylides.

在弱碱三乙胺存在下半时，稳定的α-羰基胂叶立德和几乎等摩尔量的苯硒基碘作用，转化成α-苯硒基胂叶立德。提供了一个合成α-苯硒基胂叶立德的新方法。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。