Synthesis of 2-Substituted Quinolines from 2-Aminostyryl Ketones Using Iodide as a Catalyst
作者:So Young Lee、Jiye Jeon、Cheol-Hong Cheon
DOI:10.1021/acs.joc.8b00552
日期:2018.5.4
A new protocol for the synthesis of 2-substituted quinolinesfrom 2-aminostyryl ketones has been developed using iodide as a nucleophilic catalyst. Conjugate addition of iodide to 2-aminostyryl ketones yielded the corresponding β-iodoketones, which could have a conformation where the amino and carbonyl groups are proximal through free rotation about the Cα–Cβ single bond. Subsequent condensation between
On-Water Synthesis of 2-Substituted Quinolines from 2-Aminochalcones Using Benzylamine as the Nucleophilic Catalyst
作者:So Young Lee、Cheol-Hong Cheon
DOI:10.1021/acs.joc.8b01675
日期:2018.11.2
On-water synthesis of 2-substituted quinolines from 2-aminochalcone derivatives was developed using benzylamine as the nucleophilic catalyst. Various 2-aminochalcones could be applied to this protocol, and the desired 2-substituted quinoline products were isolated in excellent yields by simple filtration. Furthermore, we elucidated the role of benzylamine in this transformation and provided the detailed
Synthesis of Polysubstituted Quinolines from α-2-Aminoaryl Alcohols Via Nickel-Catalyzed Dehydrogenative Coupling
作者:Sanju Das、Debabrata Maiti、Suman De Sarkar
DOI:10.1021/acs.joc.7b03198
日期:2018.2.16
This study reports a nickel-catalyzed sustainable synthesis of polysubstitutedquinolines from α-2-aminoaryl alcohols by a sequential dehydrogenation and condensation process that offers the advantages of a low catalyst loading and wide substrate scope. In contrast to earlier reported methods, this strategy allows the use of both primary as well as secondary α-2-aminoaryl alcohols in combination with
2-Quinolone 2, quinoline 3, coumarin (2H-1-benzopyran-2-one) 5, and 2H-1-benzopyran hemiacetal 6 were synthesized by photocyclizationreaction of traans-o-aminocinnamoyl derivatives trans-1 and trans-o-hydroxycinnamoyl derivatives trans-4. The reaction proceeds through trans-cis isomerization followed by intramolecular cyclization.
通过traans-o-氨基肉桂酰基衍生物trans - 1和trans-的光环化反应合成了2-喹诺酮2,喹啉3,香豆素(2 H -1-苯并吡喃-2-酮)5和2 H -1-苯并吡喃半缩醛6。ø -hydroxycinnamoyl衍生物反式- 4。反应通过反式-顺式异构化进行,然后进行分子内环化。
Blue-light-promoted carbon–carbon double bond isomerization and its application in the syntheses of quinolines
A blue-light-promoted carbon-carbon double bondisomerization in the absence of any photoredox catalyst is reported. It provides rapid access to a series of quinolines in good to excellent yields under simple aerobic conditions. The protocol is direct, catalyst-free and operationally convenient.