Synthesis of [a]annulated carbazoles from indol-2,3-dione
摘要:
Reaction of ethyl chloroformate with 3-aroylmethylindol-2(3H)-ones 5 affords the ethyl 3-[(2-aryl-2-ethoxycarbonyloxy)ethenyl]-2-(ethoxycarbonyloxy)indole-1-carboxylates 6 from which the corresponding [a]annulated carbazoles 10 are obtained via 6pi-electrocyclization.
Highly efficient regioselective synthesis of pyrroles via a tandem enamine formation–Michael addition–cyclization sequence under catalyst- and solvent-free conditions
Asymmetric Synthesis of Spirooxindoles with Seven Stereocenters via Organocatalyzed One‐pot Three‐component Sequential Cascade Reactions
作者:Bo‐Liang Zhao、Da‐Ming Du
DOI:10.1002/adsc.201900218
日期:2019.7.11
three‐component Michael/Mannich‐Michael/cyclization sequential cascade reaction for the construction of bispirooxindole‐spirooxindoles was developed in good yields with excellent stereoselectivities (up to >20:1 dr, 99% ee). A series of original cinnamoyl‐3‐ylideneoxindoles have been applied to this sequential cascade strategy for the first time. This new strategy provides a process for the enantioselective construction
Microwave-mediated Regiospecific Synthesis of Some Novel Annulated Spiro[indoline-3,1`-indolizin]-2-ones
作者:Abdullah Al-Bogami、Abdelaziz El-Ahl
DOI:10.2174/1570178611666141016215558
日期:2015.1.1
A library of hitherto unknown functionalized and annulated spiro[indoline-3,1`-indolizin]-2-one derivatives incorporating thiophene moiety has been synthesized under conventional and microwave irradiation conditions. The structures, regio and diastereoselectivity of the synthesized cycloadducts have been confirmed using different analytical and spectral tools.
Synthesis of [a]annulated carbazoles from indol-2,3-dione
作者:Egle M. Beccalli、Alessandro Marchesini、Tullio Pilati
DOI:10.1016/s0040-4020(01)81301-6
日期:1993.5
Reaction of ethyl chloroformate with 3-aroylmethylindol-2(3H)-ones 5 affords the ethyl 3-[(2-aryl-2-ethoxycarbonyloxy)ethenyl]-2-(ethoxycarbonyloxy)indole-1-carboxylates 6 from which the corresponding [a]annulated carbazoles 10 are obtained via 6pi-electrocyclization.
Highly efficient regioselective synthesis of pyrroles via a tandem enamine formation–Michael addition–cyclization sequence under catalyst- and solvent-free conditions
作者:Thavaraj Vivekanand、Perumal Vinoth、B. Agieshkumar、Natarajan Sampath、Arumugam Sudalai、J. Carlos Menéndez、Vellaisamy Sridharan
DOI:10.1039/c5gc00365b
日期:——
An efficient three-component, catalyst-, solvent-, and column chromatography-free procedure was developed for the synthesis of 3-(1H-pyrrol-3-yl)indolin-2-ones.