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.
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.