Catalytic Asymmetric Synthesis of Cyclohexanes by Hydrogen Borrowing Annulations
作者:Roly J. Armstrong、Wasim M. Akhtar、Tom A. Young、Fernanda Duarte、Timothy J. Donohoe
DOI:10.1002/anie.201907514
日期:2019.9.2
Hydrogen borrowing catalysis serves as a powerful alternative to enolate alkylation, enabling the direct coupling of ketones with unactivated alcohols. However, to date, methods that enable control over the absolute stereochemical outcome of such a process have remained elusive. Here we report a catalytic asymmetric method for the synthesis of enantioenriched cyclohexanes from 1,5‐diols via hydrogen
Scope and limitations of the stereoselective homogeneous hydrogenation of methylenecyclohexanols by cationic rhodium complexes
作者:John M. Brown、Stephen A. Hall
DOI:10.1016/s0040-4039(01)80167-2
日期:1984.1
Homogeneous catalytic hydrogenation of 3-methylenecyclohexanol gives -3-methylcyclohexanol with 98% stereoselectivity. but low selectivity is observed for 2-methylenecyclohexanol and 2-methylenecyclohexanemethanol.
Compounds of formula Ia and Ib
wherein A, B, C and R
1
are described herein.
公式Ia和Ib的化合物,其中A、B、C和R1如下所述。
Bicyclic Benzamides of 3-or 4-Substituted 4-(Aminomethyl)-Piperidine Derivatives
申请人:Bosmans Jean-Paul René Marie André
公开号:US20100210657A1
公开(公告)日:2010-08-19
The present invention of compounds of formula (I)
a stereochemically isomeric form thereof, an N-oxide form thereof or a pharmaceutically acceptable acid addition salt thereof. Processes for preparing said products, formulations comprising said products and their use as a medicine are disclosed, in particular for treating conditions which are related to impairment of gastric emptying.