Copper(I) iodide-catalyzed oxidative C(sp2)–H functionalization of pyridines and isoquinolines for the synthesis of imidazo[1,2-a]pyridines and 2-phenylimidazo[2,1-a]isoquinolines with vinyl azides under mild aerobic conditions is reported. Good selectivity for 3-substitutedpyridines and single isomer formation with isoquinolines were observed.
碘化铜(I)催化吡啶和异喹啉的碘化铜(I 2)催化氧化C(sp 2)–H官能团,用于在温和的条件下用乙烯基叠氮化物合成咪唑并[1,2- a ]吡啶和2-苯基咪唑并[ 2,1- a ]异喹啉有氧条件的报道。观察到对3-取代的吡啶具有良好的选择性,并与异喹啉形成了单一异构体。
EFFICIENT SYNTHESIS OF IMIDAZO[2,1-α]ISOQUINOLINES USING A HYPERVALENT IODINE(III) SULFONATE
作者:R.-S. Hou、H.-M. Wang、H.-Y. Huang、L.-C. Chen
DOI:10.1080/00304940409356637
日期:2004.10
intermediates (2). Subsequent cyclocondensation by 1-aminoisoquinoline at room temperature in the presence of sodium carbonate gave the corresponding imidazo[2,1 -a]isoquinoline derivatives (3) in good yields as shown in the Scheme. The 2,4-dinitrobenzenesulfonyloxy group located at the a position to a carbonylgroup represents an increasingly important entity in both mechanistic and synthetic organic chemistry
Three Sequential C–N Bond Formations: <i>tert</i>-Butyl Nitrite as a N1 Synthon in a Three Component Reaction Leading to Imidazo[1,2-<i>a</i>]quinolines and Imidazo[2,1-<i>a</i>]isoquinolines
作者:Prasenjit Sau、Amitava Rakshit、Anju Modi、Ahalya Behera、Bhisma K. Patel
DOI:10.1021/acs.joc.7b02815
日期:2018.1.19
dual role of an oxidant as well as a N1 synthon in a multicomponent reaction involving quinolines, isoquinolines, and styrenes. Herein, two sp2 C–H functionalizations of styrenes and one sp2 C–H functionalization of quinolines and isoquinolines lead to the formation of fused quinolines and isoquinolines via three sequential C–N bond formations.
A one-pot three-component reaction for the regioselective synthesis of thioarylated imidazoheterocycles from aryl halides and elemental sulfur using copper(I) iodide as a catalyst has been developed. Reactions proceed with high efficiency and afford thioarylated imidazoheterocycles in good yields with broad functional group tolerance.
A novel multicomponent cascade cyclization and sulfenylation/selenation using aryl methyl ketones, isoquinolin-1-amine, and sodium arylsulfinates/1,2-diphenyldiselane to synthesize imidazo[2,1-a]isoquinoline derivatives in one-pot via the construction of two C–N bonds and one C–S/C–Se bond has been reported. This multicomponent reaction realizes simultaneous C(sp3)–H amination and sulfenylation/selenation