Copper is key: A concise route to isoquinolin‐1(2H)‐ones from simple and readily available starting materials is provided by an efficient copper‐catalyzed annulation of ketones with 2‐halobenzamides. The method is applicable to a wide range of ketones containing different functional groups furnishing the products in moderate to excellent yields.
LiN(SiMe<sub>3</sub>)<sub>2</sub>/KO<sup>t</sup>Bu-Promoted Synthesis of Isoquinolone Derivatives from 2-Methylaryl Aldehydes and Nitriles
作者:Peng Ma、Yuhang Wang、Jianhui Wang、Ning Ma
DOI:10.1021/acs.joc.3c00698
日期:2023.6.2
A convenient method is proposed for the synthesis of isoquinolone derivatives from 2-methylaryl aldehydes and nitriles through LiN(SiMe3)2/KOtBu-promoted formal [4 + 2] cycloaddition reaction, featuring high atomic economy, good functional group tolerance, and easy operation. It enables the efficient formation of new C–C and C–N bonds toward isoquinolones without using preactivated amides.
Platinum(II)-catalyzed intramolecular cyclization of alkynylbenzonitriles: synthesis of 1-alkoxyisoquinolines and isoquinolones
作者:Jim Li、Lijing Chen、Elbert Chin、Alfred S. Lui、Hasim Zecic
DOI:10.1016/j.tetlet.2010.09.136
日期:2010.12
A facile synthesis of a series of 1-alkoxyisoguinolines and (2H)-isoguinolones by an intramolecular 6-endo-dig cyclization of ortho-alkynylbenzonitriles in the presence of a catalytic amount of hydrido(dimethylphosphinous acid-kappa P)[hydrogen bis(dimethylphosphinito-kappa P)]platinum(II) in various alcohols at 65-90 degrees C is described for the first time. (C) 2010 Elsevier Ltd. All rights reserved.
Triflic acid mediated sequential cyclization of ortho-alkynylarylesters with ammonium acetate
作者:Maciej E. Domaradzki、Xiaochen Liu、Jiye Ong、Gyeongah Yu、Gan Zhang、Ariel Simantov、Eliyahu Perl、Yu Chen
DOI:10.1016/j.tet.2020.131437
日期:2020.9
A triflicacid (TfOH) mediated sequential cyclization of ortho-alkynylarylesters and ammonium acetate (NH4OAc) was reported. The reaction took place via a Brønsted acid-mediated intramolecular cyclization of ortho-alkynylarylesters followed by an ammonium acetate participated substitution reaction, forming isoquinolin-1-ones as the major products. Different from most of the known synthetic methods
Whereas thermal cyclisation of variously substituted 2,3-diarylacrylazides easily provided a new way to 3-aryl-isoquinolones, nitration of these compounds mainly led to corresponding 3-aryl-4-nitro-isoquinolones. After reduction into 4-amino-3-aryl-isoquinolones, amidification and subsequent cyclization gave the yet unknown title compounds.