Asymmetric hydrovinylation of 1-vinylcycloalkenes. Reagent control of regio- and stereoselectivity.
Asymmetric hydrovinylation of 1-vinylcycloalkenes. Reagent control of regio- and stereoselectivity.
复制标题
DOI:
10.1021/ja301640e
复制
发表时间:
2012-04-18
影响因子:
15
通讯作者:
RajanBabu, T. V.
中科院分区:
文献类型:
--
作者:
Page, Jordan P.;RajanBabu, T. V.
1-Vinylcycloalkenes undergo highly regio- and enantioselective (>98% ee) 1,4-hydrovinylation (HV) when treated with ethylene (1 atmosphere) at room temperature in the presence of [(S,S)-2,4-bis-diphenylphosphinopentane (BDPP)]CoCl2 (0.05 equiv.) and methylaluminoxane. The minor 1,2-HV products, seen only in 1-vinylcyclohexene (~15%) and 1-vinylcycloheptene (2%), are formed as racemic mixtures. The corresponding Ni(II)-catalyzed HV reactions of these substrates give mostly the 1,2-adducts. Racemic 4-t- butyl-1-vinylcyclohexene, when treated with Co[(S,S)-(BDPP)]Cl2 and ethylene undergoes a rare enantiodivergent reaction giving two diastereomers each in >98% ee.
登录
查看更多内容
DOI:
10.1055/s-0028-1088213
发表时间:
2009
期刊:
Synlett : accounts and rapid communications in synthetic organic chemistry
影响因子:
--
作者:
Rajanbabu TV
通讯作者:
Rajanbabu TV
影响因子:
15
作者:
Mans, Daniel J.;Cox, G. Adam;RajanBabu, T. V.
通讯作者:
RajanBabu, T. V.
影响因子:
5.4
作者:
Grutters, Michiel M. P.;van der Vlugt, Jarl Ivar;Vogt, Dieter
通讯作者:
Vogt, Dieter
影响因子:
5.2
作者:
He, ZJ;Yi, CS;Donaldson, WA
通讯作者:
Donaldson, WA
影响因子:
5.2
作者:
Hilt, Gerhard;Danz, Michael;Treutwein, Jonas
通讯作者:
Treutwein, Jonas