The reaction of benzil and 2-aminopyridine. A correction
作者:Benito Alcaide、Rafael Pérez-Ossorio、Joaquín Plumet、Miguel A. Sierra、Severino García-Blanco、Sagrario Martínez-Carrera
DOI:10.1016/s0040-4039(00)61891-9
日期:1985.1
On the basis of X-ray crystallographic analysis, it is shown that the reaction of benzil and 2-aminopyridine affords, in agreement with Sokov's previous work, 2,2-diphenylimidazo-[1,2-a]-pyridin-3-one and not N-(2-pyridyl)-benzilmonoimine as we have previously proposed.
is an important catalytic reaction in synthetic chemistry. Herein, we report a simple strategy for the N-alkylation of 2-aminopyridines with 1,2-diketones using BF3·OEt2 as a catalyst. The reaction proceeds under aerobic conditions, leading to the formation of a diverse range of substituted secondary amines in good to excellent yields. A close inspection of the mechanistic pathway using various spectroscopic
胺的N-烷基化是合成化学中重要的催化反应。在此,我们报告了一种使用 BF 3 ·OEt 2作为催化剂对 2-氨基吡啶与 1,2-二酮进行 N-烷基化的简单策略。反应在有氧条件下进行,导致以良好到极好的收率形成各种取代的仲胺。使用各种光谱技术和计算研究对机理途径进行的仔细检查表明,反应通过形成亚胺-酮中间体并释放 CO 2来进行。
ALCAIDE, B.;PEREZ-OSSORIO, R.;PLUMET, J.;SIERRA, M. A.;GARCIA-BLANCO, S.;+, TETRAHEDRON LETT., 1985, 26, N 2, 247-248
作者:ALCAIDE, B.、PEREZ-OSSORIO, R.、PLUMET, J.、SIERRA, M. A.、GARCIA-BLANCO, S.、+
DOI:——
日期:——
The reaction of α-diketones with primary heteroaromatic amines.Synthesis and reactions of imidazo[1, 2-a]pyridin-3(2H)-ones and N-heteroaryl α-iminoketones
作者:Benito Alcaide、Joaquin Plumet、Miguel A. Sierra
DOI:10.1016/s0040-4020(01)89152-3
日期:1989.1
α-diketones with various primary heteroaromatic amines including pyridine, diazine, and azole derivatives has been studied. Benzils react with 2-amino-pyridines to give 2, 2-diarylimidazo[1, 2-a]pyridin-3(2H)-ones 1 as stable products, in good yields. With the other aminoheterocycles only N-heteroaryl-α-iminoketones 4 are obtained when the reaction takes place. On the contrary, biacetyl and 1-phenyl-1
已经研究了α-二酮与各种伯杂芳族胺(包括吡啶,二嗪和唑衍生物)的反应。苯与2-氨基吡啶反应,以稳定的收率得到2,2-diarylimidazo [1,2- a ] pyridin-3(2 H)-ones 1作为稳定的产物。当其他氨基杂环发生反应时,仅获得N-杂芳基-α-亚氨基酮4。相反,联乙酰基和1-苯基-1,2-丙二酮仅与2-氨基吡啶反应,分别得到未鉴定的联乙酰自缩合产物和α-酮缩醛5。此外,化合物1的一些新反应 有保留或没有保留双环结构的报道。