From bifunctional to trifunctional (tricomponent nucleophile-transition metal-lewis acid) catalysis: the catalytic, enantioselective α-fluorination of acid chlorides.
From bifunctional to trifunctional (tricomponent nucleophile-transition metal-lewis acid) catalysis: the catalytic, enantioselective α-fluorination of acid chlorides.
复制标题
DOI:
10.1021/ja2014345
复制
发表时间:
2011-05-18
影响因子:
15
通讯作者:
Lectka, Thomas
中科院分区:
文献类型:
--
作者:
Erb, Jeremy;Paull, Daniel H.;Dudding, Travis;Belding, Lee;Lectka, Thomas
We report in full detail our studies on the catalytic, asymmetric α-fluorination of acid chlorides, a practical method that produces an array of α-fluorocarboxylic acid derivatives in which improved yield and virtually complete enantioselectivity are controlled through electrophilic fluorination of a ketene enolate intermediate. We discovered, for the first time, that a third catalyst, a Lewis acidic lithium salt, could be introduced into a dually-activated system to amplify yields of aliphatic products, primarily through activation of the fluorinating agent. Through our mechanistic studies (based on kinetic data, isotopic labeling, spectroscopic measurements, and theoretical calculations) we were able to utilize our understanding of this “trifunctional” reaction to optimize the conditions and obtain new products in good yield and excellent enantioselectivity.
登录
查看更多内容
影响因子:
15
作者:
Abraham CJ;Paull DH;Bekele T;Scerba MT;Dudding T;Lectka T
通讯作者:
Lectka T
影响因子:
15
作者:
Franzén, J;Marigo, M;Jorgensen, KA
通讯作者:
Jorgensen, KA
DOI:
10.1016/b978-0-444-53086-8.00013-8
发表时间:
2008-01-01
期刊:
FLUORINE AND HEALTH: MOLECULAR IMAGING, BIOMEDICAL MATERIALS AND PHARMACEUTICALS
影响因子:
--
作者:
Begue, Jean-Pierre;Bonnet-Delpon, Daniele
通讯作者:
Bonnet-Delpon, Daniele
影响因子:
2.1
作者:
DESIMONI, G;FAITA, G;TACCONI, G
通讯作者:
TACCONI, G
影响因子:
2.1
作者:
BOSE, AK;KUGAJEVS.I
通讯作者:
KUGAJEVS.I