In Water and under Mild Conditions: α‐Alkylation of Ketones with Alcohols by Phase‐Transfer‐Assisted Borrowing Hydrogen Catalysis
作者:Lena Rakers、Felix Schäfers、Frank Glorius
DOI:10.1002/chem.201804308
日期:2018.10.17
produces water as the only by‐product. Nevertheless, harsh conditions such as high temperatures and organic solvents are usually required. Herein, we present a strategy to perform the α‐alkylation of ketones in aqueous media at mild temperatures by combining borrowing hydrogen with phase‐transfer catalysis. A broad scope of methyl ketones was functionalized with alkyl and benzyl alcohols in moderate
[EN] MONOAMINE REUPTAKE INHIBITORS<br/>[FR] INHIBITEURS DE LA RECAPTURE DES MONOAMINES
申请人:RES TRIANGLE INST
公开号:WO2010121022A1
公开(公告)日:2010-10-21
The invention provides bupropion analogue compounds capable of inhibiting the reuptake of one or more monoamines. The compounds may selectively bind to one or more monoamine transporters, including those for dopamine, norepinephrine, and serotonin. Such compounds may be used to treat conditions that are responsive to inhibition of the reuptake of monoamines, including addiction, depression, and obesity.
An efficient copper-catalyzed radical ring-opening halogenation with HX (aq) is described. This protocol features redox-neutral conditions, green halogen sources, and a broad substrate scope, providing practical access to distally chlorinated, brominated and iodinated alkyl ketones and alkyl nitriles with moderate to good yields.
aliphatic carbonyl reduction over aromatic carbonyl reduction. Moreover, the reaction showed good functional group tolerance and broad substrate scope as well as great potential in the late-stage modification and synthesis of natural products and pharmaceutical skeletons. Preliminary mechanistic studies and DFT calculations revealed that this reaction involved the deoxygenation of 1,3-diketone to α, β-unsaturated
Nickel-Catalyzed Reductive Coupling of γ-Metalated Ketones with Unactivated Alkyl Bromides
作者:Ning Cui、Tingzhi Lin、Yan-En Wang、Jian Wu、Yuheng Han、Xinyang Xu、Fei Xue、Dan Xiong、Patrick J. Walsh、Jianyou Mao
DOI:10.1021/acs.orglett.2c01390
日期:2022.6.10
A nickel-catalyzed reductive cross-coupling reaction of aryl cyclopropyl ketones with easily accessible unactivated alkylbromides to access aryl alkyl ketones has been developed. This strategy facilitates access to various of γ-alkyl-substituted ketones via ring opening of cyclopropyl ketones (26 examples, 50–90% yield). Initial mechanistic studies revealed that the reaction proceeds via radical cleavage