The Cyclization Reaction of Ortho-Ethynylbenzaldehyde Derivatives into Isoquinoline Derivatives.
作者:Takao SAKAMOTO、Atsushi NUMATA、Yoshinori KONDO
DOI:10.1248/cpb.48.669
日期:——
In order to elucidate the reaction mechanism of the cyclization between an ethynyl group and an imino group at the ortho-position on an aromatic ring to afford isoquinolines, reaction of 2-ethynylbenzaldehydes under various conditions was examined. It is concluded that reaction proceeds via an ionic process and the isoquinoline 4-hydrogen atom derives from the solvent. In addition, it was found taht 2-ethynylbenzaldehyde O-methyloximes underwent cycliazation in the presence of primary and secondary alcohols to give 3-substituted isoquinolines.
Palladium-catalyzed oxidative carbamoylation of isoquinoline N-oxides with formylamides by means of dual C–H oxidative coupling
作者:Bo Yao、Chen-Liang Deng、Yan Liu、Ri-Yuan Tang、Xing-Guo Zhang、Jin-Heng Li
DOI:10.1039/c4cc10140e
日期:——
A new palladium-catalyzed oxidative carbamoylation reaction of isoquinoline N-oxides with formylamides for the synthesis of isoquinoline-1-carboxamides is described.