Synthesis of Quinolines, 2-Quinolones, Phenanthridines, and 6(5H)-Phenanthridinones via Palladium[0]-Mediated Ullmann Cross-Coupling of 1-Bromo-2-nitroarenes with β-Halo-enals, -enones, or -esters
摘要:
Palladium[0]-mediated Ullmann cross-coupling of 1-bromo-2-nitrobenzene (1 R = H) and its derivatives with a range of beta-halo-enals, -enones, or -esters readily affords the corresponding beta-aryl derivatives, which are converted into the corresponding quinolines, 2-quinolones, phenanthridines, or 6(5H)-phenanthridinones on reaction with dihydrogen in the presence of Pd on C or with TiCl3 in aqueous acetone.
Visible-Light-Promoted and One-Pot Synthesis of Phenanthridines and Quinolines from Aldehydes and <i>O</i>-Acyl Hydroxylamine
作者:Xiao-De An、Shouyun Yu
DOI:10.1021/acs.orglett.5b01096
日期:2015.6.5
A one-pot synthesis of phenanthridines and quinolines from commercially available or easily prepared aldehydes has been reported. O-(4-Cyanobenzoyl)hydroxylamine was utilized as the nitrogen source to generate O-acyl oximes in situ with aldehydes catalyzed by Bronsted acid. O-Acyl oximes were then subjected to visible light photoredox catalyzed cyclization via iminyl radicals to furnish aza-arenes. A variety of phenanthridines and quinolines have been prepared assisted by Bronsted acid and photocatalyst under visible light at room temperature with satisfactory yields.
US5281710A
申请人:——
公开号:US5281710A
公开(公告)日:1994-01-25
US5276159A
申请人:——
公开号:US5276159A
公开(公告)日:1994-01-04
US5527805A
申请人:——
公开号:US5527805A
公开(公告)日:1996-06-18
Molecular design and chemical synthesis of potent enediynes. 2. Dynemicin model systems equipped with C-3 triggering devices and evidence for quinone methide formation in the mechanism of action of dynemicin A
作者:K. C. Nicolaou、W. M. Dai
DOI:10.1021/ja00049a023
日期:1992.11
synthesis and chemical properties of designed enediynes related to dynemicin A. These modelsystems are equipped with triggering devices at C-3 of the aromatic nucleus. The design of these compounds (1 and 2) was based on the hypothesis that a C-3 phenolic group generated in situ would be capable of promoting epoxide opening and subsequent Bergman cycloaromatization according to the dynemicin A cascade
继续上一篇文章的主题,本文描述了与动力霉素 A 相关的设计烯二炔的合成和化学性质。这些模型系统在芳环的 C-3 处配备了触发装置。这些化合物(1 和 2)的设计基于这样一个假设,即原位生成的 C-3 酚基能够促进环氧化物开放和随后的 Bergman 环芳构化,根据 dynemicin A 级联