Enantioselective Nickel-Catalyzed Alkyne–Azide Cycloaddition by Dynamic Kinetic Resolution
作者:En-Chih Liu、Joseph J. Topczewski
DOI:10.1021/jacs.1c01354
日期:2021.4.14
α-chiral, being derived from amino acids. This makes α-N-chiral triazoles attractive building blocks. This report describes the first enantioselective triazole synthesis that proceeds via nickel-catalyzed alkyne–azide cycloaddition (NiAAC). This dynamic kineticresolution is enabled by a spontaneous [3,3]-sigmatropic rearrangement of the allylic azide. The 1,4,5-trisubstituted triazole products, derived
A palladium-catalyzed coupling procedure of alkenes with alkynylnitriles has been demonstrated for the synthesis of dichlorides. The reaction is the first example of nitrile-assisted C(sp3)-Cl formation promoted by coordination of a cyano group with an alkylpalladium(II) complex. The construction of a five-membered cycle intermediate successfully inhibits the β-hydride abstraction, resulting in direct
Copper-Catalyzed Oxidative Transformation of Aryl Propargylic Azides to Aryl Propiolonitriles
作者:Teng Wang、Hang Yin、Ning Jiao
DOI:10.1002/adsc.201201056
日期:2013.4.15
A concise copper(I)‐catalyzed oxidativetransformation of aryl propargyl azides to arylpropiolonitriles has been developed. Arylpropiolonitrile derivatives can be obtained in moderate to good yields by this strategy. An oxidative Schmidt rearrangement is involved in this transformation.
[EN] MOLECULAR SOLAR ENERGY STORAGE<br/>[FR] STOCKAGE MOLÉCULAIRE D'ÉNERGIE SOLAIRE
申请人:CHALMERS VENTURES
公开号:WO2019106029A1
公开(公告)日:2019-06-06
The present invention relates to norbornadiene compounds (Formula I), and the corresponding quadricyclane compounds (Formula III). The compounds are to be included in a molecular thermal systems (MOST), and to be used for storing solar energy.
A novel tandem oxidative Ritter reaction/hydration/aldolcondensation of α-arylketones with substituted propiolonitriles has been developed. This protocol conveniently affords a wide range of functionalized 3-acyl-3-pyrrolin-2-ones through the efficient construction of four chemical bonds, a C–N bond, a C═C bond, and two C═O bonds, and the formation of one ring bearing an aza-quaternary center, which