Iron-Catalyzed Indolizine Synthesis from Pyridines, Diazo Compounds, and Alkynes
作者:Tim Douglas、Anca Pordea、James Dowden
DOI:10.1021/acs.orglett.7b03252
日期:2017.12.1
The iron(III)-catalyzed synthesis of indolizines from commercially available alkyne, pyridine, and diazo precursors is reported. This mild, expedient method is tolerant of various solvents and proceeds with as little as 0.25 mol % [Fe(TPP)Cl]. Significantly, this multicomponent reaction is compatible with electrophilic alkynes; control experiments demonstrate the importance of the catalyst in promoting
Iodine Mediated Base‐Controlled Regio‐Selective Annulation of 2‐(Pyridin‐2‐yl)acetate Derivatives with Acrylic Esters for the Synthesis of Indolizines
作者:Youlai Fang、Fei Li、Yuzhu Yang、Xiaolan Liu、Weidong Pan
DOI:10.1002/adsc.202000103
日期:2020.3.17
An iodine mediated base‐controlled reaction between 2‐(pyridin‐2‐yl)acetate derivatives and acrylicesters has been developed for the selective synthesis of 1,3‐disubstituted indolizines and 1,2‐disubstituted indolizines. A single‐pot reaction of 2‐(pyridin‐2‐yl)acetate derivatives and acrylicesters in the presence of CsOAc delivers 1,3‐disubstitued indolizines, while KHCO3 promotes the formation
Hemoglobin-Catalyzed Synthesis of Indolizines Under Mild Conditions
作者:Fengxi Li、Xuyong Tang、Yaning Xu、Chunyu Wang、Liu Zhang、Jiaxin Zhang、Jiaxu Liu、Zhengqiang Li、Lei Wang
DOI:10.1002/ejoc.201901591
日期:2019.12.19
Hemoglobins were used to catalyze the multicomponent synthesis of indolizines. Satisfactory yields and mild reaction conditions make this method highly useful for practical applications. Furthermore, this study provides a new example of a hemoglobin‐catalyzed organic reaction and is expected to expand the utilization of hemoglobin in organic synthesis.
A copper-catalyzed formal [1 + 2 + 2]-annulation of alkyne-tethered diazo compounds with pyridines, which affords polycyclic fused indolizines in synthetically useful to good yields under mild reaction conditions, has been reported. This method features the use of an inexpensive copper catalyst and readily available starting materials, broad substrate generality, and operational simplicity. Notably
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