quantum dots (QDs) can activate α-C-H bond of THF via forming QDs/THF conjugates. Under visible light irradiation, the resultant alkoxyalkyl radical directly engages in radical cross-coupling with α-amino radical from amino C-H bonds or radicaladdition with alkene or phenylacetylene, respectively. In contrast to stoichiometric oxidant or hydrogenatom transfer reagents required in previous studies, the
Copper-Catalyzed Cyanomethylation of Substituted Tetrahydroisoquinolines with Acetonitrile
作者:Wei Zhang、Shiping Yang、Zengming Shen
DOI:10.1002/adsc.201600050
日期:2016.7.28
A novel method for the synthesis of cyanomethylated tetrahydroisoquinolines has been developed with mild reaction conditions, good yields and a broad substrate scope. Acetonitrile, a common solvent, is for the first time used as a pronucleophile for this type of two sp3 C−H bonds cross‐dehydrogenative coupling (CDC) reaction. A new oxidative system (CuCl2/TEMPO/Cs2CO3) has been established by our group
已经开发了一种温和的反应条件,良好的收率和广泛的底物范围的合成氰基甲基化四氢异喹啉的新方法。乙腈是一种常见的溶剂,首次被用作此类两个sp 3 C H键交叉脱氢偶联(CDC)反应的亲核试剂。我们的小组已经建立了一种新的氧化系统(CuCl 2 / TEMPO / Cs 2 CO 3),其中发现温和的TEMPO试剂是一种高效的氧化剂。
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.
Oxidative cross-dehydrogenative coupling between N-aryl tetrahydroisoquinolins and 5H-oxazol-4-ones through two methodologies: copper catalysis or a metal-free strategy
作者:Xihong Liu、Jinlong Zhang、Shixiong Ma、Yunxia Ma、Rui Wang
DOI:10.1039/c4cc04508d
日期:——
A direct oxidative cross-dehydrogenative coupling (CDC) of N-aryl tetrahydroisoquinolins with 5H-oxazol-4-ones catalyzed by CuBr using air as the only oxidant has been developed, which could also proceed smoothly under a metal-free oxidative system with PhI(OAc)2 as the oxidant. A series of alkylated tetrahydroisoquinolin derivatives were obtained in good yields and excellent diastereoselectivities.
An electrochemically-driven organocatalytic enantioselective oxidative coupling of tetrahydroisoquinolines and acrylaldehyde was developed. Various chiral C1-alkenyl tetrahydroisoquinolinesderivatives were obtained with 69–86% yields and 93:7–96:4 er. Notable features of this reaction include asymmetric organocatalysis (5.0 mol% β-ICD as catalyst), electricity as the oxidant, air atmosphere, and undivided