Synthesis of 1-Aminoisoquinolines via the Coinage Metal Cocatalyzed Reaction of 2-Alkynylbenzaldoximes with Isocyanoacetates
摘要:
An efficient reaction of 2-alkynylbenzaldoximes with 2-isocyanoacetates cocatalyzed by silver triflate and gold(I) chloride is described, providing 1-aminoisoquinolines in good to excellent yields under mild conditions. Mechanistic experiments suggest that the gold(I) cation might play a crucial role in the activation of the isocyanide substrate. The observed reactivity and the unique pathway of substrate activation in the cocatalyzed processes are quite informative for further study.
Facile synthesis of 1-aminoisoquinolines via the tandem reactions of 2-alkynylbenzaldoximes with isothiocyanates
作者:Wenhai Li、Yue Wang、Tao Lu
DOI:10.1016/j.tet.2012.06.030
日期:2012.8
1-aminoisoquinolines in good to excellent yields is described; this involves the reaction of 2-alkynylbenzaldoximes and isothiocyanates, which is catalyzed by silver triflate in dichloromethane, at room temperature. This transformation involves tandem 6-endo cyclization, [3+2] cycloaddition, and subsequent rearrangement. The simple operational protocol provides a cost-effective, diversity-oriented route to
An efficient reaction of 2-alkynylbenzaldoximes with 2-isocyanoacetates cocatalyzed by silver triflate and gold(I) chloride is described, providing 1-aminoisoquinolines in good to excellent yields under mild conditions. Mechanistic experiments suggest that the gold(I) cation might play a crucial role in the activation of the isocyanide substrate. The observed reactivity and the unique pathway of substrate activation in the cocatalyzed processes are quite informative for further study.