An improved preparation and a new application of trichloromethylcarbinols from enolizable ketones
摘要:
We report an improved method for the preparation of trichloromethylcarbinols from enolizable ketones. Trichloromethylcarbinols were obtained in good to excellent yields by using of a combination of CHCl3, n-BuLi, and chlorotitanium (IV) triisopropoxide. Hydrolysis of the trichloromethylcarbinol to an alpha,beta-unsaturated ester was also explored. (C) 2014 Elsevier Ltd. All rights reserved.
Practical synthesis of 3,3-substituted dihydroquinoxalin-2-ones from aryl 1,2-diamines using the Bargellini reaction
作者:Thomas A. Alanine、Stephen Stokes、James S. Scott
DOI:10.1016/j.tetlet.2016.08.057
日期:2016.9
The reaction of aromatic 1,2-diamines with trichloromethylcarbinols under mild, basic phase-transfer conditions provided expedient access to 3,3-disubsituted quinoxalin-2(1H)-ones in good to moderate yields. The use of unsymmetrical aryl diamines gave a regioisomeric mixture of products with the ratio shown to be dependent on the electronic nature of the aromatic substituents. 2,3-Diaminopyridines
在温和的碱性相转移条件下,芳族1,2-二胺与三氯甲基甲醇的反应可方便地获得3,3-二取代的喹喔啉-2(1 H)-酮,收率良好。不对称芳基二胺的使用产生了产物的区域异构混合物,其比例显示出取决于芳族取代基的电子性质。也可以使用2,3-二氨基吡啶,其对二氢[3,2 - b ]吡啶并吡嗪-2-酮异构体表现出优异的选择性。
Wolf, Reinhard; Steckhan, Eberhard, Journal of the Chemical Society. Perkin transactions I, 1986, p. 733 - 740
作者:Wolf, Reinhard、Steckhan, Eberhard
DOI:——
日期:——
An improved preparation and a new application of trichloromethylcarbinols from enolizable ketones
We report an improved method for the preparation of trichloromethylcarbinols from enolizable ketones. Trichloromethylcarbinols were obtained in good to excellent yields by using of a combination of CHCl3, n-BuLi, and chlorotitanium (IV) triisopropoxide. Hydrolysis of the trichloromethylcarbinol to an alpha,beta-unsaturated ester was also explored. (C) 2014 Elsevier Ltd. All rights reserved.
WOLF, R.;STECKHAN, E., J. CHEM. SOC. PERKIN TRANS., 1986, N 5, 733-739