C-H insertion. By employing chiral diphenylethylene diamine (dpen) as ligands bearing electron-withdrawing arylsulfonyl substituents, the reactions occur with remarkable chemo- and enantioselectivities; the competing Curtius-type rearrangement was largely suppressed. Enantioselective nitreneinsertion to allylic/propargylic C-H bonds was also achieved with remarkable tolerance to the C═C and C≡C bonds
Reductive C–C Coupling by Desulfurizing Gold-Catalyzed Photoreactions
作者:Lumin Zhang、Xiaojia Si、Yangyang Yang、Sina Witzel、Kohei Sekine、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1021/acscatal.9b01368
日期:2019.7.5
which cannot be efficiently accessed by previously reported methods. This mild and highlyefficient C–C bond formation strategy uses mercaptans both as electron-deficient alkyl radical precursor as well as the hydrogen source. Two examples of amino acids have also been modified by using this strategy. Moreover, this methodology could be applied in polymer synthesis. Gram-scale synthesis and mechanistic
Parameters Influencing Reactivity and Regioselectivity in the Methoxycarbonylation of Arylalkenes
作者:Barend Bezuidenhoudt、Maretha du Plessis、Charlene Marais
DOI:10.1055/s-0035-1560912
日期:——
hydroformylation and hydroesterification reactions. However, little is known in this regard about the influence of the steric and electronic environment around the double bond of the substrate. A variety of arylalkenes were therefore subjected to methoxycarbonylation to investigate the steric and electronic effects of substituents on the aromatic ring of the substrate on the regioselectivity and reactivity in the
Copper-Catalyzed Conjugate Addition of Carbonyls as Carbanion Equivalent via Hydrazones
作者:Siyi Luo、Marie Peng、Pierre Querard、Chen-Chen Li、Chao-Jun Li
DOI:10.1021/acs.joc.1c01380
日期:2021.9.17
catalyzed by readily available copper complexes at room temperature. The employment of mesitylcopper(I) and electron-rich phosphine bidentateligand is a key factor affecting reactivity. The reaction allows various aromatic hydrazones to react with diverse conjugated compounds to produce 1,4-adducts in yields of about 20 to 99%.
[EN] TRISUBSTITUTED 3,4-DIHYDRO-1H-ISOQUINOLIN COMPOUND, PROCESS FOR ITS PREPARATION, AND ITS USE<br/>[FR] COMPOSÉ 3,4-DIHYDRO-1H-ISOQUINOLÉINE TRISUBSTITUÉE, MÉTHODE DE PRÉPARATION, ET SON UTILISATION
申请人:ACTELION PHARMACEUTICALS LTD
公开号:WO2009083903A1
公开(公告)日:2009-07-09
The present invention relates to the compound of formula (7*)acetate (see below), a process for its preparation, and its use.