Ylide

NMR studies on reaction of stabilized phosphorus ylide with phthalic anhydride

稳定膦叶立德和邻苯二甲酸酐反应的NMR研究

How to choose the base used in the synthesis of arsine ylide is studied .

本文主要研究了胂叶立德合成中碱的选择。

Reaction of Oxosulfonium Ylide with Carbonyl Compounds by phase Transfer Catalyzed Method

相转移催化作用下甲基氧硫叶立德与羰基化合物的反应

The new phosphorus ylide could react with aldehyde to give trisubstituted alkenes .

这种新型的膦叶立德在有醛存在的条件下，可生成三取代的烯烃。

STUDIES ON THE WITTIG REACTION (ⅹⅷ)── Ion Effects in the Wittig Reaction of Stabilized Ylide

Wittig反应的研究（ⅩⅧ）&稳定膦叶立德的Wittig反应中的离子效应

In these reported reactions , it is generally considered that an in situ formed phosphorus ylide is the key intermediate .

在这些反应中，人们普遍认为反应经过了一个原位生成的磷叶立德活性中间体。

Synthesis of α, β - Unsaturated Ketones via Telluronium Ylide

用碲Ylide合成α，β-不饱和酮

Study of The Industrial Production Technology For Ultra-High Purity Arsine in China How to choose the base used in the synthesis of arsine ylide is studied .

我国超纯砷烷产业化生产技术研究本文主要研究了胂叶立德合成中碱的选择。

Chemistry and Applications of Phosphonium and Arsonium Ylides XXVII Synthesis of Phosphonium Ylide Containing Perfluoroalkyl Group

膦、胂叶立德的化学与应用XXVII.含全氟烷基膦叶立德的合成

This review summarizes previous mechanistic studies on reactions of dihalocarbenes with carbonyl compounds where dihalocarbonyl Ylide was suggested to be the intermediate .

对近年来二卤卡宾与羰基化合物的反应机理研究进行了总结。

METHODS 3,4,5-trimethoxy-triphenyl benzylidene bromide phosphine salt , the important precursor of the phosphine Ylide , was synthesis from deoxidize , bromization and addition .

方法以3,4,5-三甲氧基苯甲醛为原料，经过还原、溴代、加成三步反应得到叶立德前体3,4,5-三甲氧基苄溴三苯基膦盐。

The paper reviews the recent progress in [ 3 + 2 ] cycloaddition using azomethine ylide , including preparation of ylide , mechanism and selectivity of reaction , and application in the total synthesis of natural products .

综述了亚甲胺叶立德的制备、它参与的[3+2]环加成反应的反应机理、反应选择性及在天然产物全合成中的应用等方面的最新进展。

A method for determining Huckel-Hubbard ( H-H ) parameters is proposed , and the H-H theory is extended to analyze [ 2 , 3 ] sigmatropic rearrangements including Witting rearrangement , sulphur ylide rearrangement and allylic sulfoxide rearrangement .

本文提出一种确定Hückel-Hubbard（H-H）参数的方法，并将H-H理论首次推广用于Witting重排、硫叶立德重排、烯丙基亚砜重排等[2,3]σ键迁移重排反应的研究。