Chemoselective Conjugate Reduction of α,β-Unsaturated Ketones Catalyzed by Rhodium Amido Complexes in Aqueous Media
作者:Xuefeng Li、Liangchun Li、Yuanfu Tang、Ling Zhong、Linfeng Cun、Jin Zhu、Jian Liao、Jingen Deng
DOI:10.1021/jo100256t
日期:2010.5.7
electron-withdrawing functional groups, could be reduced on the alkenic double bonds with high selectivities employing amido-rhodium hydride complex in aqueousmedia, and up to 100% chemoselectivity has been achieved. It is notable that the chemoselectivity was improved significantly on going from organic solvent to water. Moreover, a 1,4-addition mechanism has been proposed on the basis of the corresponding
[EN] PYRIDAZINONE DERIVATIVES AND USE THEREOF AS P2X7 RECEPTOR INHIBITORS<br/>[FR] DÉRIVÉS DE PYRIDAZINONE ET LEUR UTILISATION COMME INHIBITEURS DU RÉCEPTEUR P2X7
申请人:NISSAN CHEMICAL IND LTD
公开号:WO2009057827A1
公开(公告)日:2009-05-07
Novel pyridazinone compounds of formula (I), which inhibit the purinergic P2X7 receptor and are useful for prevention, therapy and improvement of inflammatory and immunological diseases.
Highly Enantioselective Synthesis of 3-Substituted Furanones by Palladium-Catalyzed Kinetic Resolution of Unsymmetrical Allyl Acetates
作者:Bin Mao、Yining Ji、Martín Fañanás-Mastral、Giuseppe Caroli、Auke Meetsma、Ben L. Feringa
DOI:10.1002/anie.201109075
日期:2012.3.26
near‐perfect Pd‐catalyzed kineticresolution of 1,3‐disubstituted unsymmetrical allylic acetates uses silyl enol ethers as nucleophiles to access the important 3‐substituted‐furanone scaffold (see scheme; DACH=diaminocyclohexyl, dba=dibenzylideneacetone). The reaction proceeds under mild conditions and provides the desired products with excellent chemo‐, regio‐, and enantioselectivity.
Molybdenum-Catalyzed Diastereoselective <i>anti</i>-Dihydroxylation of Secondary Allylic Alcohols
作者:Shixia Su、Chuan Wang
DOI:10.1021/acs.orglett.9b00735
日期:2019.4.5
In this protocol, we report a Mo-catalyzed anti-dihydroxylation of secondary allylic alcohols, providing a general method for the preparation of 1,2,3-triols bearing up to three continuous stereocenters with excellent diastereocontrol. The mechanistic studies reveal that this dihydroxylation reaction consists of two steps and up to excellent diastereomeric ratios of the final triol products can be
Catalyst versus Substrate Induced Selectivity: Kinetic Resolution by Palladacycle Catalyzed Allylic Imidate Rearrangements
作者:René Peters、Zhuo-qun Xin、Frank Maier
DOI:10.1002/asia.201000386
日期:——
Making chairs: A kinetic resolution of allylicimidates by planar chiral palladacycles is described which is the result of high face selectivity for olefin coordination to the catalyst and inherent substrate selectivity. These studies confirm that planar chiral palladacycles mainly operate via (half)chair‐like transition states/intermediates.