catalyzed synthesis of indolizine-1-carboxylates through oxidative CC and CN bondformations by the reaction of 2-pyridyl acetates with alkynes and alkenes without metal, oxidant, and base. This procedure is compatible with a broad range of functional groups in both alkynes and alkenes with good yields. The reaction proceeds through a tandem CC bondformation followed by an intramolecular cyclization
Tuning radical reactivity using iodine in oxidative C(sp<sup>3</sup>)–H/C(sp)–H cross-coupling: an easy way toward the synthesis of furans and indolizines
作者:Shan Tang、Kun Liu、Yue Long、Xiaotian Qi、Yu Lan、Aiwen Lei
DOI:10.1039/c5cc01825k
日期:——
Molecular iodine was found to be an effective redox catalyst for the oxidative cross-coupling of carbonyl compounds with terminal alkynes.
分子碘被发现是一种有效的氧化还原催化剂,可用于羰基化合物与末端炔烃的氧化交叉偶联反应。
Indolizine Synthesis via Oxidative Cross-Coupling/Cyclization of Alkenes and 2-(Pyridin-2-yl)acetate Derivatives
A novel copper/I2-mediated oxidative cross-coupling/cyclization of 2-(pyridin-2-yl)acetate derivatives and simple olefins is developed, which provides a straightforward and efficient access to structural diversely indolizines. A series of 1,3-di- and 1,2,3-trisubstituted indolizines are easily synthesized in modest to excellent yields.
开发了新颖的铜/ I 2介导的2-(吡啶-2-基)乙酸酯衍生物和简单烯烃的氧化交叉偶联/环化,其提供了直接且有效地获得结构多样的吲哚嗪的途径。一系列1,3-二-和1,2,3-三取代的吲哚嗪很容易合成,收率适中至优异。
An I<sub>2</sub>-catalyzed oxidative cyclization for the synthesis of indolizines from aromatic/aliphatic olefins and α-picoline derivatives
作者:Likui Xiang、Fuming Zhang、Baohua Chen、Xiaobo Pang、Xiaodong Yang、Guosheng Huang、Rulong Yan
DOI:10.1039/c5ra01234a
日期:——
A novel I2-catalyzed intermolecular oxidative tandem cyclization reaction of aromatic/aliphatic olefins and α-picoline derivatives has been achieved for the synthesis of indolizines under metal-free conditions. In this transformation, substituted indolizines are obtained in moderate to good yields through C–C/C–N bond formation in one pot.
Synthesis of substituted indolizines via radical oxidative decarboxylative annulation of 2-(pyridin-2-yl)acetate derivatives with α,β-unsaturated carboxylic acids
作者:Jian Gu、Chun Cai
DOI:10.1039/c6ob01902a
日期:——
A copper mediated radical oxidative annulation of 2-(pyridin-2-yl)acetate derivatives with α,β-unsaturated carboxylic acids is developed. This study offers a new and expedient strategy for the synthesis of useful indolizines in moderate to good yields and exhibits a broad substrate scope and good functional group tolerance.