Efficient Synthesis of Isoquinoline Derivatives via AgOTf/Cu(OTf)2-Cocatalyzed Cyclization of 2-Alkynyl Benzaldoxime
摘要:
An efficient, AgOTf and Cu(OTf)(2) multicatalytic intramolecular cycloisomerization of 2-alkynylbenzaldoxime is reported. Isoquinoline N-oxides have been found to be deoxygenated to the corresponding quinolines in good yields in dimethylformamide/dichloroethane (v/v 5:1) as solvent at 120 degrees C.
Efficient Synthesis of Isoquinoline Derivatives via AgOTf/Cu(OTf)2-Cocatalyzed Cyclization of 2-Alkynyl Benzaldoxime
摘要:
An efficient, AgOTf and Cu(OTf)(2) multicatalytic intramolecular cycloisomerization of 2-alkynylbenzaldoxime is reported. Isoquinoline N-oxides have been found to be deoxygenated to the corresponding quinolines in good yields in dimethylformamide/dichloroethane (v/v 5:1) as solvent at 120 degrees C.
A silver(I)-catalyzed reaction of 2-alkynylbenzaldoxime with arylsulfonyl chloride
作者:Jinming Yang、Qing Xiao、Jie Sheng、Jie Wu
DOI:10.1016/j.tet.2013.11.056
日期:2014.1
A silver-catalyzed reaction of 2-alkynylbenzaldoxime with arylsulfonyl chloride proceeds smoothly at room temperature to afford 4-tosyloxyisoquinolines in moderate to good yields. Additionally, the resulting 4-tosyloxyisoquinolines could be further elaborated through palladium-catalyzed coupling reactions leading to diverse isoquinolines.
A silver(I)-catalyzed reaction of 1-((cyclopropylidenemethyl)-2-alkynyl)arene with 2-alkynylbenzaldoxime leads to 1-((1,3-dihydroisobenzofuran-1-yl)methyl)isoquinolines in good to excellent yields. A radical process is believed to be involved in the transformation.