Auto-tandem PET and EnT photocatalysis by crude chlorophyll under visible light towards the oxidative functionalization of indoles
作者:Saira Banu、Shubham Choudhari、Girija Patel、Prem P. Yadav
DOI:10.1039/d1gc00138h
日期:——
Chlorophyll is the most abundant photocatalytic pigment that enables plants to absorb solar energy and convert it to energystoragemolecules. Herein, we report a tandem photocatalytic approach utilizing the natural pigment chlorophyll in crude form to achieve photoinducedelectrontransfer (PET) and energytransfer (EnT) towards the oxidative functionalization of indoles. Redox potentials, ESR, fluorescence
Palladium-Catalyzed Dearomative Allylic Alkylation of Indoles with Alkynes To Synthesize Indolenines with C3-Quarternary Centers
作者:Shang Gao、Zijun Wu、Xinxin Fang、Aijun Lin、Hequan Yao
DOI:10.1021/acs.orglett.6b01947
日期:2016.8.5
A palladium-catalyzed dearomative allylicalkylation of indoles with alkynes to construct indolenines with C3-quarternary centers was reported. The in situ formed arylallene intermediate omitted the need to install leaving groups on the allylic compounds and employ extra oxidants to oxidize the allylic C–H bonds. The reaction exhibited good functional group tolerance and high atom economy. Moreover
Fe-Catalyzed Sequential C(sp<sup>3</sup>)–H/N–H Annulation of 2-Methylindoles with Ethyl Trifluoropyruvate at Room Temperature: Construction of Pyrrolo[1,2-α]indoles
An efficient and benign iron-catalyzed room-temperature method was developed for direct sequential C(sp3)–H/N–H annulation to construct pyrroloindole scaffolds. This strategy features cheap and readily available raw materials and mild room-temperature reaction conditions and provides a green and practical method for the one-pot rapid synthesis of a wide range of diversely functionalized pyrrolo[1,2-α]indoles
Organocatalytic Enantioselective Functionalization of Unactivated Indole C(sp
<sup>3</sup>
)−H Bonds
作者:Dengke Ma、Zhihan Zhang、Min Chen、Zhenyang Lin、Jianwei Sun
DOI:10.1002/anie.201909397
日期:2019.10.28
Described here is a direct catalyticasymmetric functionalization of unactivated alkyl indoles using organocatalysis. In the presence of an effective chiral urea catalyst and a phosphoric acid additive, the intermolecular C-C bond formation between alkyl indoles and trifluoropyruvates proceeded with highefficiency and enantiocontrol. Unlike previous asymmetric C(sp3 -H) functionalizations of α-azaarenes