Blue Light-Promoted Formal [4+1]-Annulation of Diazoacetates with <i>o</i>-Aminoacetophenones: Synthesis of Polysubstituted Indolines and Computational Study
作者:Jinzhou Chen、Shuhao Liu、Xinxin Lv、Kemiao Hong、Jinping Lei、Xinfang Xu、Wenhao Hu
DOI:10.1021/acs.joc.0c01974
日期:2020.11.6
A blue light-promoted formal [4+1]-annulation of diazoacetates with o-aminoacetophenones has been reported, which provides an environmentally friendly method for the synthesis of polysubstituted indoline derivatives in moderate to good yields with excellent diastereoselectivities. Detailed mechanistic studies through density functional theory calculations reveal that the (E)-enol species is the key
Kempter,G. et al., Journal fur praktische Chemie (Leipzig 1954), 1972, vol. 314, # 3-4, p. 543 - 556
作者:Kempter,G. et al.
DOI:——
日期:——
Copper-Mediated Selective C–H Activation and Cross-Dehydrogenative C–N Coupling of 2′-Aminoacetophenones
作者:Andivelu Ilangovan、Gandhesiri Satish
DOI:10.1021/ol402750r
日期:2013.11.15
Isatins were obtained by cross-dehydrogenative C-N annulation and dealkylative C-N annulation of 2'-N-aryl/alkylaminoacetophenones and 2'-N,N-dialkylaminoacetophenones respectively in the presence of Cu(OAc)(2)center dot H2O/NaOAc/air. However, on reaction with CuBr, 2'-N-benzylaminoacetophenones underwent selective oxidation of an a-methylene group of amine rather than the 2-acetyl group to provide corresponding benzamides exclusively. Base played an important role in selective oxidation by lowering the temperature and time.
Copper-Catalyzed Intramolecular Oxidative C(sp<sup>3</sup>)-H Amidation of 2-Aminoacetophenones: Efficient Synthesis of Indoline-2,3-diones
作者:Jinbo Huang、Tingting Mao、Qiang Zhu
DOI:10.1002/ejoc.201400012
日期:2014.5
An efficient synthesis of diverse indoline-2,3-diones from 2-aminoacetophenones through copper-catalyzedintramolecular C(sp3)–H amidation is developed. The reaction proceeds in DMSO by using O2 as the sole oxidant to provide the desired products in moderate to good yields.
Electrocatalytic C–H/N–H Coupling of 2′-Aminoacetophenones for the Synthesis of Isatins
作者:Peng Qian、Ji-Hu Su、Yukang Wang、Meixiang Bi、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/acs.joc.7b00635
日期:2017.6.16
2′-Aminoacetophenones undergo a C(sp3)–Hoxidation followed by intramolecular C–N bond formation by virtue of a simple electrochemicaloxidation in the presence of n-Bu4NI, providing various isatins with moderate to good yields. The reaction intermediates were detected, and a radical-based pathway was proposed.