Differentiating alkyne reactivity in the post-Ugi transformations: Access to polycyclic indole-fused frameworks
摘要:
The Ugi adducts prepared from propiolic acids, propargylamines, indole-2-carbaldehydes, and isocyanides were utilized to assemble polycyclic indole-fused frameworks via two consecutive carbocyclizations involving triple bonds. First, the peptidyl position of Ugi adduct underwent potassium carbonate-mediated cyclization onto the triple bond derived from propiolic acid. Then, the position 3 of indole core engaged into gold-catalyzed cyclization onto the propargylamine-originated alkyne, completing the construction of polycyclic core. (C) 2018 Elsevier Ltd. All rights reserved.
A wide range of substituted pyridine derivatives were synthesized in moderate to good yields from a N-propargylic α-enamino ester. The synthetic strategy involves regioselective addition of propargyl amine to the α-carbon of the alkynyl ester to produce N-propargylic α-enamino ester which acts as the key intermediate for the synthesis of the pyridine derivatives.
This invention relates to novel heterocyclyl-2-propyn-1-amines which are useful as dopamine beta hydroxylase inhibitors in the treatment of hypertension.
Synthesis of 2,5-Dihydropyridine Derivatives by Gold-Catalyzed Reactions of β-Ketoesters and Propargylamines
作者:Francisco J. Fañanás、Tamara Arto、Abraham Mendoza、Félix Rodríguez
DOI:10.1021/ol201655u
日期:2011.8.19
The reaction of simple beta-ketoesters and propargylamines under gold(III) catalysis leads to the formation of the elusive 2,5-dihydropyridine system. This new reaction provides the synthesis of potentially bioactive compounds in moderate to high yields.
BARGAR, THOMAS M.;GREEMER, LAWRENCE C.;MCCARTHY, JAMES R.
作者:BARGAR, THOMAS M.、GREEMER, LAWRENCE C.、MCCARTHY, JAMES R.