Studies of Acenaphthene Derivatives. XVI. The Wittig Reaction with Acenaphthenequinone
作者:Otohiko Tsuge、Masashi Tashiro、Ichiro Shinkai
DOI:10.1246/bcsj.42.181
日期:1969.1
The reactions of acenaphthenequinone (III) with several Wittig reagents have been studied. When III was reacted with equimolar amounts of benzylidenetriphenylphosphoranes (IV) at room temperature, the corresponding benzylideneacenaphthenones (V) were obtained in fairly good yields, but the reactions of benzil and phenanthrenequinone with IV did not take place under similar conditions. The reaction of
已经研究了苊醌 (III) 与几种 Wittig 试剂的反应。当 III 与等摩尔量的亚苄基三苯基膦 (IV) 在室温下反应时,相应的亚苄基苊酮 (V) 以相当好的收率获得,但苄基和菲醌与 IV 的反应在类似条件下没有发生。III与2当量IV在苛刻条件下反应仅得到V,没有得到二亚苄基化合物。III 与共振稳定的正膦,如乙炔-、苯亚酰-和对氯苯亚酰正膦的反应,得到预期的 α,β-不饱和酮。在与乙氧基羰基亚甲基正膦反应中,生成两个立体异构的乙氧基羰基亚甲基苊酮,也由乙氧基羰基甲基膦酸二乙酯反应得到。异构体的结构是在核磁共振、紫外光谱和质谱研究的基础上确定的。
Design and Application of Chiral Bifunctional 4-Pyrrolidinopyridines: Powerful Catalysts for Asymmetric Cycloaddition of Allylic <i>N</i>-Ylide
作者:Qingqing Luo、Zhou Tian、Jie Tang、Jie Wang、Yin Tian、Cheng Peng、Gu Zhan、Bo Han
DOI:10.1021/acscatal.2c01924
日期:2022.6.17
4-hydroxy-2-(hydroxydiphenylmethyl)pyrrolidine-1-formyl group at the pyridine’s C3 site and a chiral side arm at the C2 position of the p-pyrrolidine ring. An operationally simple three-step synthetic route allows for efficient and economical catalyst preparation. In comparison with other Lewis bases, the catalyst exhibits excellent efficiency and stereoselectivity in the asymmetric (3 + 2) cycloaddition
Substituent effects in the formation of a few acenaphthenone-2-ylidene ketones and their molecular docking studies and in silico ADME profile
作者:Daly Kuriakose、Roshini K. Thumpakara、Jesna A、Jomon P. Jacob
DOI:10.1016/j.molstruc.2020.129209
日期:2021.1
effects in the reactionbetween 4-substituted acetophenones and acenaphthenequinone in the presence of KOH in methanol. In all cases, expected Claisen-Schimdt condensation was the first step. However, depending on the nature of 4-substituent on acetophenone, the initially formed condensation product remain unchanged or underwent Dominosequence of reactions to give three different 2:2adducts arising through
Domino reaction sequences leading to the formation of 2:2 adducts between acenaphthenequinone and acetophenone
作者:Jomon P. Jacob、Christy Kunjachan、L. U. Sajitha、Roshini K. Thumpakara、K. Rakesh、V. Nidhisha、Perupparampil A. Unnikrishnan、Sreedharan Prathapan
DOI:10.3998/ark.5550190.p008.834
日期:——
A Michael-aldol dominoreactionsequence of acenaphthenequinone with acetophenone in the presence of KOH in methanol solvent leading to the formation of three different 2:2adducts arising through three distinct reactionsequences is described. Similar sequencesleading to a highly substituted furan derivative were observed in the reactionbetween phenanthrenequinone and acetophenone.