Synthesis of All‐Carbon Quaternary Centers by Palladium‐Catalyzed Olefin Dicarbofunctionalization
作者:Maximilian Koy、Peter Bellotti、Felix Katzenburg、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.201911012
日期:2020.2.3
The redox-neutral dicarbofunctionalization of tri- and tetrasubstituted olefins to form a variety of (hetero)cyclic compounds under photoinduced palladium catalysis is described. This cascade reaction process was used to couple styrenes or acryl amides with a broad range of highly decorated olefins tethered to aryl or alkyl bromides (>50 examples). This procedure enables one or two contiguous all-carbon
A highly modular radical cascade strategy based upon radical cyclisation/allylic substitution sequence between alkyl/aryl bromides, 1,3-dienes and nucleophiles ranging from sulfinates to amines, phenols and 1,3-dicarbonyls is described (>80 examples). Palladium phosphine complexes – which merge properties of photo- and cross coupling-catalysts – allow to forge three bonds with complete 1,4-selectivity
Intramolecular radical cyclization reactions. An approach to the indole alkaloids
作者:James P. Dittami、Halasya Ramanathan
DOI:10.1016/0040-4039(88)80012-1
日期:1988.1
The intramolecular radical cyclization reaction of N-allyl substituted derivatives of o-bromoacetanilide provides a short and effective route to a variety of dihydroindole systems.
Activation of Aryl and Alkyl Halides Enabled by Strong Photoreduction Potentials of a Hantzsch Ester/Cs<sub>2</sub>CO<sub>3</sub> System
作者:Junhua Xu、Yingjun Lan、Bin Liu
DOI:10.1021/acs.joc.3c02320
日期:2024.1.5
We disclose herein a light-induced Hantzsch ester-initiated aryl and alkyl radical generation protocol from aryl halides (Br and Cl) and alkyl iodides. This method provides access to a wide range of benzo-fused heterocycles and C(sp3)–C(sp3) coupling products. The reductive detosylation reaction has also been demonstrated using the same reaction conditions. Initial mechanism studies provide evidence
Sml2-promoted aryl radical cyclization. A new synthetic entry into heterocycles
作者:Junji Inanaga、Osamu Ujikawa、Masaru Yamaguchi
DOI:10.1016/s0040-4039(00)74317-6
日期:1991.4
Benzofuran, naphthofuran, and indole frameworks were expediently constructed at ambient temperature from arene bromides with ortho O- and N-substituents containing double or triple bonds via radical cyclization process promoted by Sml2.