Oxidative Cleavage of Olefins by In Situ-Generated Catalytic 3,4,5,6-Tetramethyl-2-iodoxybenzoic Acid/Oxone
摘要:
Oxidative cleavage of a variety of olefins to the corresponding ketones/carboxylic acids is shown to occur in a facile manner with 3,4,5,6-tetramethyl-2-iodobenzoic acid (TetMe-IA)/oxone. The simple methodology involves mere stirring of the olefin and catalytic amount (10 mol %) of TetMe-IA and oxone in acetonitrile-water mixture (1:1, v/v) at rt. The reaction mechanism involves initial dihydroxylation of the olefin with oxone, oxidative cleavage by the in situ-generated 3,4,5,6-tetramethyl-2-iodoxybenzoic acid (TetMe-IBX), and oxidation of the aldehyde functionality to the corresponding acid with oxone. Differences in the reactivities of electron-rich and electron-poor double bonds have been exploited to demonstrate chemoselective oxidative cleavage in substrates containing two double bonds.
Verfahren zur Herstellung von Alkenylbenzol- oder -naphthalin-derivaten
申请人:CIBA-GEIGY AG
公开号:EP0041043B1
公开(公告)日:1983-11-09
US4335055A
申请人:——
公开号:US4335055A
公开(公告)日:1982-06-15
US4533505A
申请人:——
公开号:US4533505A
公开(公告)日:1985-08-06
Oxidative Cleavage of Olefins by In Situ-Generated Catalytic 3,4,5,6-Tetramethyl-2-iodoxybenzoic Acid/Oxone
作者:Jarugu Narasimha Moorthy、Keshaba Nanda Parida
DOI:10.1021/jo502002w
日期:2014.12.5
Oxidative cleavage of a variety of olefins to the corresponding ketones/carboxylic acids is shown to occur in a facile manner with 3,4,5,6-tetramethyl-2-iodobenzoic acid (TetMe-IA)/oxone. The simple methodology involves mere stirring of the olefin and catalytic amount (10 mol %) of TetMe-IA and oxone in acetonitrile-water mixture (1:1, v/v) at rt. The reaction mechanism involves initial dihydroxylation of the olefin with oxone, oxidative cleavage by the in situ-generated 3,4,5,6-tetramethyl-2-iodoxybenzoic acid (TetMe-IBX), and oxidation of the aldehyde functionality to the corresponding acid with oxone. Differences in the reactivities of electron-rich and electron-poor double bonds have been exploited to demonstrate chemoselective oxidative cleavage in substrates containing two double bonds.
Stereoselective synthesis of vinyl nitriles through a Ramberg–Bäcklund approach
作者:Octavio A. Valle-González、Ángel I. Salazar-Bello、J. Armando Luján-Montelongo
DOI:10.1039/d3ob00214d
日期:——
applicability of vinyl nitriles in the preparation of pharmaceuticals, polymers, and other valuable materials benefits from robust preparative methodologies. In this work, we present a novel approach for the synthesis of vinyl nitriles based on the Ramberg–Bäcklund olefination reaction (RBR). While there are few examples for accessing functionalized olefins using the RBR, we believe that this methodology
乙烯基腈在药物、聚合物和其他有价值材料制备中的适用性得益于可靠的制备方法。在这项工作中,我们提出了一种基于 Ramberg–Bäcklund 烯化反应 (RBR) 合成乙烯基腈的新方法。虽然很少有使用 RBR 获得功能化烯烃的例子,但我们相信这种方法体现了安装特权乙烯基腈构建单元的有用方法,例如美国 FDA 批准的抗病毒利匹韦林的丙烯腈片段。