Indoles are a popular heterocycle scaffold that can be found in various natural products and advanced materials, which are related to our daily life commodities. In this work, we developed an efficient method to synthesize C3-alkylated and alkenylated indoles via manganese-catalyzed dehydrogenative transformation of benzyl alcohols and 2-arylethanols with indoles under mild conditions with high yield
Regioselective C<sub>3</sub>Alkylation of Indoles for the Synthesis of Bis(indolyl)methanes and 3-Styryl Indoles
作者:Ruiqin Zhang、Renchao Ma、Rener Chen、Lei Wang、Yongmin Ma
DOI:10.1021/acs.joc.3c02551
日期:2024.2.2
Herein, we describe an efficient transition-metal-free regioselective C3alkylation of indoles for the synthesis of bis(indolyl)methanes and 3-styryl indoles. Nitrobenzene is employed as the oxidant to oxidize the alcohols in the presence of a strong base and the reaction avoids the use of transition metals such as Ru and Mn. The protocol provides a favorable route to access biologically active compounds
在此,我们描述了一种有效的、无过渡金属的吲哚区域选择性C 3烷基化反应,用于合成双(吲哚基)甲烷和3-苯乙烯基吲哚。采用硝基苯作为氧化剂,在强碱存在下氧化醇,该反应避免了过渡金属如Ru和Mn的使用。该方案提供了获取生物活性化合物(如芦丁、vibrindole A 和涡轮霉素 B)的有利途径。
Chiral Imidodiphosphoric Acid-Catalyzed Highly Diastereo- and Enantioselective Synthesis of Poly-Substituted 3,4-Dihydro-2<i>H</i>-pyrans: [4 + 2] Cycloadditions of β,γ-Unsaturated α-Ketoesters and 3-Vinylindoles
Imidodiphosphoric acids were employed to catalyze inverse-electron-demand hetero-Diels–Alder reaction of β,γ-unsaturatedα-ketoesters and 3-vinylindoles. A series of optically active 3,4-dihydro-2H-pyran derivatives with three contiguous stereogenic centers was synthesized in excellent yields (70–99%), diastereoselectivities (>20:1), and enantioselectivities (73–99%). The resulting indole containing