Asymmetric Allylation of Ketones and Subsequent Tandem Reactions Catalyzed by a Novel Polymer-Supported Titanium-BINOLate Complex
作者:Jagjit Yadav、Gretchen R. Stanton、Xinyuan Fan、Jerome R. Robinson、Eric J. Schelter、Patrick J. Walsh、Miquel A. Pericas
DOI:10.1002/chem.201400204
日期:2014.6.2
asymmetric allylation of ketones. The catalyst showed good activity and excellent enantioselectivity, typically matching the results obtained in the corresponding homogeneous reaction. The allylation reaction mixture could be submitted to epoxidation by simple treatment with tert‐butyl hydroperoxide (TBHP), and the tandem asymmetricallylation epoxidation process led to a highly enantioenriched epoxy alcohol
Silver-Catalyzed Asymmetric Sakurai−Hosomi Allylation of Ketones
作者:Manabu Wadamoto、Hisashi Yamamoto
DOI:10.1021/ja0553351
日期:2005.10.1
allylation of simple ketones. A significaant improvement of the reactivity was observed by using THF as the solvent. The catalyst turnover was increased by addition of 1 equiv of MeOH. AgF and (R)-DIFLUORPHOS predominantly formed a 1:1 complex that provided high enantioselectivity. This catalyst system can be applied to various simple ketones, and corresponding tertiaryhomoallylicalcohols were obtained
Indium triflate catalyzed allylation of ketones with diallyldibutyltin
作者:Ling-yan Liu、Long Tang、Lei Yu、Wei-xing Chang、Jing Li
DOI:10.1016/j.tet.2005.08.101
日期:2005.11
A series of ketones underwent an allylation reaction using diallyldibutyltin in the presence of a catalytic amount of In(OTf)(3). The method was found to be superior to most of the known methods. Thus, a new allyltin reagent Bu2Sn(allyl)(2)/In(OTf)(3) for ketones was developed. (c) 2005 Elsevier Ltd. All rights reserved.
SnCl2-mediated carbonyl allylation of aldehydes and ketones in ionic liquid
作者:Long Tang、Li Ding、Wei-Xing Chang、Jing Li
DOI:10.1016/j.tetlet.2005.11.022
日期:2006.1
In ionicliquid [bmim]BF4, SnCl2·2H2O acts as an inexpensive and efficient metal salt for carbonyl allylation. By applying ionicliquid, some previously reported serious operational problems associated with the SnCl2-mediated allylation reaction are avoided. Furthermore, ketones, which are less reactive than aldehydes, can also be allylated in high yields with this system.