Homogeneous catalysis. transition metal based lewis acid catalysts.
作者:T. Keith Hollis、William Odenkirk、N.P. Robinson、John Whelan、B. Bosnich
DOI:10.1016/s0040-4020(01)87259-8
日期:1993.1
Transition metal basedLewisacids provide catalysts for the Diels-Alder and Mukaiyama reactions. These catalysts must possess an electron deficient axophilic metal center and a labile coordination position. Unlike traditional Lewisacids, those derived from transition metals can function in the presence of water and have welldefined structures. It is shown how a normally electron rich ruthenium atom
Study on the “Tin-Ene” reaction of α-bromoacetophenone and metallic tin with aldehydes
作者:Jing-Yao Zhou、Yu Jia、Qiu-Yi Shao、Shi-Hui Wu
DOI:10.1080/00397919608086752
日期:1996.2
Abstract β-hydroxy ketones were obtained in good yields by the “tin-ene” reactions of α-bromoacetophenone and metallic tin with aldehydes.
摘要 通过 α-溴苯乙酮和金属锡与醛的“锡-烯”反应,以良好的收率获得了 β-羟基酮。
Indium-trichloride catalyzed mukaiyama-aldol reaction in water: Solubility, aggregation and internal pressure effect
作者:Teck-Peng Loh、Jian Pei、Kevin Siong-Ve Koh、Guo-Qiang Cao、Xu-Ran Li
DOI:10.1016/s0040-4039(97)00595-9
日期:1997.5
Studies on the effects of water and the binding characteristic of InCl3 in the Mukaiyama-aldol reaction with an in depth mechanistic probe on the probable internalpressure and aggregation effects exerted in this media.
the reduction of nonconjugated Δ²-isoxazolines to the corresponding β-hydroxy ketones using Al/CuCl2 as the reducing agent has been developed. The method is both rapid and complete requiring less than ten minutes to attain total ring cleavage. This is the first example of using an in situ prepared Al/Cu couple in organic synthesis. reduction - isoxazolines - β-hydroxyketones - aluminum/copper couple
Direct and Electrophilic Preparation of α-Thiocyanatoketones and Aldehydes Using Thiocyanatotrimethylsilane and Sulfuryl Chloride
作者:Yoo Tanabe、Takuya Makita、Kei Mori
DOI:10.1246/cl.1994.2275
日期:1994.12
The thiocyanato (-SCN) group was directly and regioselectively introduced into the α-position of ketones, aldehydes, and aldols in an electrophilic manner by the combined use of thiocyanatotrimethylsilane and sulfuryl chloride with or without cyclic sec-amine catalysts under mild reaction conditions.