A HFIP-promoted highly selective hydroxyalkylation of aniline derivatives with arylglyoxal hydrates has been realized. The reaction produces various N,N-dialkylanilines and their derivatives with α-hydroxy carbonyl units in good to excellent yields under mild conditions. Furthermore, the synthetic potential of this method has been demonstrated by the facile synthesis of several structurally interesting
Isomerization of Hetaryl Analogues of α‐Benzoins in Basic Media
作者:Sergey P. Ivonin、Andrey V. Lapandin
DOI:10.1081/scc-200032447
日期:2004.1.1
Abstract The α → β isomerization of hetaryl analogues of benzoins occurring in basicmedia on heating is a convenient preparative way to obtain hydroxymethylcarbonyl‐substituted derivatives of π‐excessive heterocycles. The reaction is favored by increased catalyst basicity, solvent polarity, and the electron‐donor ability of a hetaryl residue. At room temperature, oxidation to hetaryl analogues of
Gold-Catalyzed “Back-to-Front” Synthesis of 4-Silyloxyindoles
作者:Miguel A. Muñoz-Torres、Samuel Suárez-Pantiga、Roberto Sanz
DOI:10.1021/acs.orglett.4c01581
日期:2024.6.14
derivatives were easily prepared from simple pyrrolesthrough a three-step sequence involving hydroxyalkylation-alkynylation-O-silylation. Their reaction with IPrAuNTf2 triggers a C2-pyrrole attack onto the activatedalkyne and subsequent highly selective 1,2-migration of the oxyalkyl group in the intermediate spirocycle. This approach enables the efficient synthesis of a wide selection of regioselectively