Wittig reactions are most commonly used to convert aldehydes and ketones to alkenes. [1][2][3] Most often, the Wittig reaction is used to introduce a methylene group using …

2021年4月10日 · Geissler研究了五价磷的化学性质，描述了甲基三苯磷 ( Ph3P=CH2 )与二苯甲酮的反应，定量 生成 1,1-二苯 乙烯 和三苯氧 膦 ( Ph 3 P= O)。 Wittig认识到这一发现的重要 …

Wittig反应（维蒂希反应）是醛或酮与 磷叶立德 （Wittig试剂）发生亲核加成生成烯烃反应，该反应由德国化学家 Georg Wittig 在1954年发现，为此他获得了1979年的 诺贝尔化学奖。 Wittig …

2023年1月23日 · Organophosphorus ylides react with aldehydes or ketones to give substituted alkenes in a transformation called the Wittig reaction. This reaction is named for George Wittig …

2018年2月6日 · Below is a useful reaction called the Wittig reaction that achieves this transformation. It won its inventor, Georg Wittig, the 1979 Nobel Prize in Chemistry (along with …

Methylenetriphenylphosphorane is an organophosphorus compound with the formula Ph 3 PCH 2. It is the parent member of the phosphorus ylides, popularly known as Wittig reagents. It is a …

Triphenylphosphine (IUPAC name: triphenylphosphane) is a common organophosphorus compound with the formula P (C 6 H 5) 3 and often abbreviated to P Ph 3 or Ph 3 P.

最简单的维蒂希试剂是亚甲基三苯基膦（Ph3P+−C−H2），是一个橙黄色固体，对空气和水都不稳定，可通过三苯基膦和溴甲烷生成的溴化三苯基甲基鏻 Ph3P+-CH3·Br−在干燥乙醚和氮气流 …

2025年2月24日 · A common Wittig reagent is methylenetriphenylphosphorane (Ph 3 P=CH 2) which is synthesized by reacting Triphenyl phosphine with methylbromide followed by …

【结构式】 Ph3P=CH2 【物理性质】 白色晶体，mp 96 oC。溶于醚、 THF、DME、苯、甲苯、DMSO。水或者质子溶剂会将该试剂彻底破坏。 【制备和商品】 该试剂无法作为商品购得， …