Assembly of 3-Acyloxindoles via CuI/<scp>l</scp>-Proline-Catalyzed Intramolecular Arylation of β-Keto Amides
作者:Biao Lu、Dawei Ma
DOI:10.1021/ol0625886
日期:2006.12.1
[Structure: see text] Intramolecular coupling of beta-keto 2-iodoanilides catalyzed by CuI/L-proline in DMSO occurs at room temperature, affording substituted 3-acyloxindoles in good yield. Electroniceffects on the aromatic ring have little influence on this reaction. Variations at the 1, 3, 4, 5, and 6 positions of the oxindoles were achieved by employing the corresponding amides.
[结构:见正文] CuI / L-脯氨酸在DMSO中催化的β-酮2-碘代苯胺分子内偶联在室温下进行,提供了高收率的取代3-酰基新多烯。芳环上的电子效应对该反应几乎没有影响。通过使用相应的酰胺,可以在羟吲哚的1、3、4、5和6位发生变化。
US4465831A
申请人:——
公开号:US4465831A
公开(公告)日:1984-08-14
Ruthenium-catalyzed intramolecular cyclization of diazo-β-ketoanilides for the synthesis of 3-alkylideneoxindoles
作者:Wai-Wing Chan、Tsz-Lung Kwong、Wing-Yiu Yu
DOI:10.1039/c2ob06985g
日期:——
With [Ru(p-cymene)Cl2]2 as catalyst, diazo-β-ketoanilides would undergo intramolecular carbenoid arene CâH bond functionalization to afford 3-alkylideneoxindoles in up to 92% yields. The reaction occurs under mild conditions and exhibits excellent chemoselectivity. The lack of primary KIE (kH/kD â¼ 1) suggests that the reaction should not proceed by rate-limiting CâH bond cleavage; a mechanism involving cyclopropanation of the arene is proposed.