Iodine-Mediated Oxidative Cyclization of 2-(Pyridin-2-yl)acetate Derivatives with Alkynes: Condition-Controlled Selective Synthesis of Multisubstituted Indolizines
作者:Lisheng He、Yuzhu Yang、Xiaolan Liu、Guangyan Liang、Chunyan Li、Daoping Wang、Weidong Pan
DOI:10.1055/s-0039-1690229
日期:2020.2
An iodine-mediated oxidative cyclization reaction between 2-(pyridin-2-yl)acetate derivatives and different alkynes has been developed, which provides regioselective and chemoselective syntheses of multiply substituted indolizines under modified reaction conditions. Plausible mechanisms have been proposed to explain the selective syntheses of indolizines. This protocol can be also applied to the stepwise
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
Cu-catalyzed transannulation reaction of pyridotriazoles with terminal alkynes under aerobic conditions: efficient synthesis of indolizines
作者:V. Helan、A. V. Gulevich、V. Gevorgyan
DOI:10.1039/c4sc03358b
日期:——
Cu(I)-catalyzed denitrogenative transannulation reaction of pyridotriazoles with terminalalkynes en route to indolizines was developed. Compared to the previously reported Rh-catalyzed transannulation reaction, this Cu-catalyzed method features aerobicconditions and a much broader scope of pyridotriazoles and alkynes.
开发了一种 Cu( I ) 催化的吡啶并三唑与末端炔烃脱氮转环反应生成中氮茚的过程。与之前报道的Rh催化转环反应相比,这种Cu催化方法具有需氧条件以及更广泛的吡啶并三唑和炔烃范围。
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。