ASYMMETRIC HYDROGENATION METHOD FOR KETONE COMPOUND
申请人:Zhang Wanbin
公开号:US20130053574A1
公开(公告)日:2013-02-28
The invention relates to an asymmetric hydrogenation method for ketone compounds, comprising the step of: under hydrogen atmosphere, in the presence of an in situ catalyst derived from a chiral ligand and a ruthenium salt, adding a ketone compound and a base into a second solvent to carry out an asymmetric hydrogenation for the ketone compound. The invention can obtain a conversion of 100% and a highest asymmetric inducement effect of 99.7% for the ketone compound. The invention has the advantages including simple procedure, high conversion and selectivity, good atom economy and good prospect of industrial application.
Aldehyde-Catalyzed Transition Metal-Free Dehydrative β<i>-</i>Alkylation of Methyl Carbinols with Alcohols
作者:Qing Xu、Jianhui Chen、Quan Liu
DOI:10.1002/adsc.201200996
日期:2013.3.11
borrowing hydrogen strategy in which alcohols were activated by transition metal‐catalyzed anaerobic dehydrogenation, the direct addition of aldehydes was found to be an effective but simpler way of alcohol activation that can lead to efficient and green aldehyde‐catalyzed transition metal‐free dehydrative C‐alkylation of methyl carbinols with alcohols. Mechanistic studies revealed that the reaction proceeds
Asymmetric hydrogenation method for ketone compound
申请人:Zhang Wanbin
公开号:US08962852B2
公开(公告)日:2015-02-24
The invention relates to an asymmetric hydrogenation method for ketone compounds, comprising the step of: under hydrogen atmosphere, in the presence of an in situ catalyst derived from a chiral ligand and a ruthenium salt, adding a ketone compound and a base into a second solvent to carry out an asymmetric hydrogenation for the ketone compound. The invention can obtain a conversion of 100% and a highest asymmetric inducement effect of 99.7% for the ketone compound. The invention has the advantages including simple procedure, high conversion and selectivity, good atom economy and good prospect of industrial application.
Nickel-Catalyzed Guerbet Type Reaction: C-Alkylation of Secondary Alcohols <i>via</i> Double (de)Hydrogenation
作者:Reshma Babu、Murugan Subaramanian、Siba P. Midya、Ekambaram Balaraman
DOI:10.1021/acs.orglett.1c00782
日期:2021.5.7
Acceptorless double dehydrogenativecross-coupling of secondary and primaryalcohols under nickel catalysis is reported. This Guerbet type reaction provides an atom- and a step-economical method for the C-alkylation of secondaryalcohols under mild, benign conditions. A broad range of substrates including aromatic, cyclic, acyclic, and aliphatic alcohols was well tolerated. Interestingly, the C-alkylation