An efficient asymmetric aerobic oxidation of tetrahydroisoquinolines with terminal alkynes was realized under mild reaction conditions using O2 as the sole oxidant. A chiral N,N′-dioxide/zinc(II)/iron(II) bimetallic cooperative catalytic system proves to be efficient for the formation of various α-alkynyl substituted tetrahydroisoquinolines in good to excellent yields and enantioselectivities. A primary
visible light-driven α-alkylation of N-aryl tetrahydroisoquinolines was initiated through electron donor–acceptor complex photochemistry. The reaction can proceed smoothly without the addition of any photocatalysts, transition-metal catalysts, or additional oxidants. The proposed mechanism was supported by various mechanistic studies, and the reactive open-shell alkyl radicals were generally produced
Electron Donor–Acceptor Complex-Initiated Photochemical Cyanation for the Preparation of α-Amino Nitriles
作者:Qing Xia、Yufei Li、Lan Cheng、Xin Liang、Chenlin Cao、Peng Dai、Hongping Deng、Weihua Zhang、Qingmin Wang
DOI:10.1021/acs.orglett.0c03703
日期:2020.12.18
An electron donor–acceptor complex-initiated α-cyanation of tertiaryamines has been described. The reaction protocol provides a novel method to synthesize various α-aminonitriles under mild conditions. The reaction can proceed smoothly without the presence of photocatalysts and transition metal catalysts, and either oxidants are unnecessary or O2 is the only oxidant. The practicality of this method
Chiral organic contact ion pairs in metal-free catalytic enantioselective oxidative cross-dehydrogenative coupling of tertiary amines to ketones
作者:Gen Zhang、Yunxia Ma、Shoulei Wang、Weidong Kong、Rui Wang
DOI:10.1039/c3sc50604e
日期:——
A novel chiral organic contact ion-pair catalytic system has been developed for the transition-metal-free catalytic enantioselective oxidative cross-dehydrogenative coupling of tertiary amines to ketones for sp3 C–H functionalization. This new strategy provides an efficient and environmentally friendly way to access diversify optically active C1-alkylated tetrahydroisoquinoline derivatives from simple starting materials under mild conditions.
Enantioselective Metal/Organo-Catalyzed Aerobic Oxidative sp<sup>3</sup>C–H Olefination of Tertiary Amines Using Molecular Oxygen as the Sole Oxidant
作者:Gen Zhang、Yunxia Ma、Shoulei Wang、Yaohu Zhang、Rui Wang
DOI:10.1021/ja303333k
日期:2012.8.1
An organocatalysis/copper-catalyzed asymmetric oxidative sp(3) C-H olefination reaction of tertiary amines with olefins usingmolecularoxygen as the sole oxidant under mild conditions was realized for the first time. This novel strategy provides an efficient and environmentally friendly way to access diversify optically active C(1)-alkene tetrahydroisoquinoline derivatives.