New intramolecular cyclization and rearrangement processes based on the radical aryl-aryl coupling of arylsubstituted 2-azetidinones
作者:Benito Alcaide、Alberto Rodríguez-Vicente
DOI:10.1016/s0040-4039(98)01373-2
日期:1998.9
2-azetidinones having fused or not biaryl units are easily prepared by the tin-mediated, intramolecular aryl-aryl radical cyclization of readily available arylsubstituted 2-azetidinones. The regioselectivity and efficiency of the process is determined both by the length of the linking chain through the β-lactam nucleus and by the number and position of the substituents on the aromatic acceptor ring.
Manganese-Catalyzed Synthesis of Imines from Primary Alcohols and (Hetero)Aromatic Amines
作者:Daniel Raydan、Sofia Friães、Beatriz Royo、M. Manuel B. Marques、Nuno Viduedo、A. Sofia Santos、Clara S. B. Gomes
DOI:10.1055/a-1828-1678
日期:2022.8
describe the synthesis of a wide variety of imines through oxidativecoupling of alcohols and aromatic amines catalyzed by Mn complexes bearing N^N triazole ligands. A wide variety of imines in excellent yields (up to 99%) have been prepared. Mn-based catalysts proved to be highly efficient and versatile, allowing for the first time the preparation of several imines containing N-based heterocycles.
在此,我们描述了通过由带有 N^N 三唑配体的 Mn 配合物催化的醇和芳香胺的氧化偶联来合成多种亚胺。已经制备了多种高产率(高达 99%)的亚胺。Mn 基催化剂被证明是高效和通用的,首次允许制备几种含有 N 基杂环的亚胺。
Cascade and one-pot processes providing substituted quinolines from aldimines and allylsilanes: auto-tandem catalysis of triflic imide
We have demonstrated cascade and one-pot reactions, which constitute inverse electron demand hetero-Diels-Alder reaction and oxidative aromatization, to provide substituted quinolines to form aryl aldimines and allylsilanes. The cascade process involves an auto-tandem catalysis; Tf2NH activates these mechanistically distinct reactions. We have found that a multicomponent process starting from aniline, aldehyde, and allylsilane is also available. (c) 2007 Elsevier Ltd. All rights reserved.