The acid-promoted reactions of phenyliodonium ylides with substituted anilines and their applications to the synthesis of indoles
作者:Xianpei Wang、Bing Han、Junyan Wang、Wei Yu
DOI:10.1039/c0ob00201a
日期:——
N-substituted anilines 1 react readily with phenyliodonium ylides 2 derived from 1,3-dicarbonyl compounds in the presence of a catalytic amount of BF3·Et2O, forming the C–N coupling products 3, which are precursors for the synthesis of indoles. On the basis of this result, the direct synthesis of indoles from 1 and 2 under thermal conditions and photochemical conditions was explored. The transformations could
One-pot synthesis of N-methylindoles from N-methylanilines and of benzofurans from phenols using transition-metal carbene X–H insertion reactions
作者:Mark A. Honey、Alexander J. Blake、Ian B. Campbell、Brian D. Judkins、Christopher J. Moody
DOI:10.1016/j.tet.2009.07.077
日期:2009.10
Transition-metalcarbene X–H insertion reactions (X=N or O) have been employed in the simple conversion of anilines and phenols into indoles and benzofurans, respectively. Thus copper(II) catalyzed N–H insertion reactions of α-diazo-β-ketoesters with N-methylanilines followed by treatment with acidic ion-exchange resin gives indoles. In a similar manner, dirhodium(II) catalyzed O–H insertion reactions