摘要 AK 2 S 2 O 8据报道在吲哚的C-3位上α-酰胺基砜被α-活化的区域选择性烷基化。本文开发的方案通过使用路易斯酸,粘土和树脂作为吲哚与α-酰胺基砜的吲哚的Friedel-Crafts型烷基化的催化剂,提供了一种替代先前方法的新策略。形成的产物带有通用的可转化砜基和氨基。该反应条件可耐受多种底物,包括一系列在不同位置具有吸电子基团和给电子基团的吲哚。而且,各种α-取代的苯酰胺基砜和一些α-脂族酰胺基砜也以适中的产率得到所需的产物。此外,进行了初步的机理研究,并讨论了可能的反应机理。 AK 2 S 2 O 8据报道在吲哚的C-3位上α-酰胺基砜被α-活化的区域选择性烷基化。本文开发的方案通过使用路易斯酸,粘土和树脂作为吲哚与α-酰胺基砜的吲哚的Friedel-Crafts型烷基化的催化剂,提供了一种替代先前方法的新策略。形成的产物带有通用的可转化砜基和氨基。该反应条件可耐受多种底
ABSTRACT A catalyst-freethree-componentreaction of indoles, carbonyls, and arenesulfinic acids performed at room temperature provides direct access to biologically important 3-(1-arylsulfonylalkyl)indoles. This process features mild conditions, low cost, broad substrate scope, and high yields, and mechanistically bis(indolyl)methanes were identified as the key intermediates. GRAPHICAL ABSTRACT
Palladium-Catalyzed Asymmetric Cycloadditions of Vinylcyclopropanes and in Situ Formed Unsaturated Imines: Construction of Structurally and Optically Enriched Spiroindolenines
作者:Ze-Shui Liu、Wen-Ke Li、Tai-Ran Kang、Long He、Quan-Zhong Liu
DOI:10.1021/ol503383x
日期:2015.1.2
vinyl cyclopropane and α,β-unsaturated imines generated in situ from aryl sulfonyl indoles is reported. The reaction proceeds with high diastereoselectivity to provide the optically enriched spirocyclopentane-1,3′-indolenines in up to 74% yield and with up to 97% ee, which contains an all-carbon quaternary center and two tertiary stereocenters. The reaction involves a first conjugateaddition of the
<i>N</i>-Heterocyclic Carbene-Catalyzed Cross-Coupling of Aldehydes with Arylsulfonyl Indoles
作者:Yi Li、Fu-Qiang Shi、Qing-Li He、Shu-Li You
DOI:10.1021/ol9013238
日期:2009.8.6
3-(1-Arylsulfonylalkyl)indoles as electrophiles in the N-heterocyclic carbene-catalyzed umpolung reaction of aldehydes were realized for the first time. This intermolecular Stetter-type reaction features the commercially available catalyst and mild reaction conditions, providing α-(3-indolyl) ketone derivatives in high yields for a wide range of substrates.
Ag-Catalyzed Diastereo- and Enantioselective Synthesis of β-Substituted Tryptophans from Sulfonylindoles
作者:Bao-Hui Zheng、Chang-Hua Ding、Xue-Long Hou、Li-Xin Dai
DOI:10.1021/ol100161n
日期:2010.4.16
The asymmetric catalytic synthesis of beta-substituted tryptophan derivatives was realized in high diastereo- and enantioselectivity by the reaction of glycine derivatives with sulfonylindoles in the presence of catalyst derived from AgCl and a commercially available chiral monodentate phosphoramidite ligand. The resulting adduct was readily converted to beta-substituted tryptophan in 95% overall yield for two steps, which presented a highly efficient route to chiral beta-substituted tryptophan.