efficient construction of a series of chiral phenanthrenone derivatives bearing an all‐carbon quaternary center. The effectiveness of this method in the synthesis of terpenes and steroids was demonstrated by a highly efficient synthesis of a kaurene intermediate, the facile construction of the skeleton of the anabolic steroid boldenone, and the enantioselective totalsynthesis of the antimicrobial diterpene
Pd(0)-Catalyzed intramolecular arylative dearomatization of β-naphthols
作者:Ren-Qi Xu、Ping Yang、Shu-Li You
DOI:10.1039/c7cc04022a
日期:——
arylative dearomatization of β-naphthols is described. Using Q-Phos as a ligand, the arylative dearomatization reaction proceeded smoothly affording excellent yields and chemoselectivity even when the catalyst loading was reduced to 0.1 mol%. This method offers an efficient access to a series of structurally diverse spirocarbocycles. Preliminary investigation indicates that an enantioselective reaction
Synthesis of Rationally Halogenated Buckybowls by Chemoselective Aromatic C−F Bond Activation
作者:Olena Papaianina、Vladimir A. Akhmetov、Alexey A. Goryunkov、Frank Hampel、Frank W. Heinemann、Konstantin Y. Amsharov
DOI:10.1002/anie.201700814
日期:2017.4.18
carbon‐based nanomaterials with outstanding potential in different fields of technology. The current state of the art provides quite a limited number of synthetic pathways to BS‐PAHs; moreover, none of these approaches show high selectivity and tolerance of functional groups. Herein we demonstrate an effective route to BS‐PAHs that includes directed intramolecular aryl–aryl coupling through C−F bond
[5]- and [6]helicenes were synthesized in moderate to good yields from Z,Z-bis(bromostilbene)s by palladium-catalyzeddouble C−H arylation reaction. This method can be applied to the syntheses of helicenes possessing electron-deficient substituents.
Construction of Indoline/Indolenine Ring Systems by a Palladium-Catalyzed Intramolecular Dearomative Heck Reaction and the Subsequent Aza-semipinacol Rearrangement
作者:Dong Gao、Lei Jiao
DOI:10.1021/acs.joc.1c00209
日期:2021.4.16
The palladium-catalyzed intramolecular dearomative Heckreaction of 2,3-disubstituted indoles serves as an access to spiro-indoline products. Herein, we report an efficient construction of indoline/indolenine core stuctures via a dearomative Heckreaction of simple 2,3-disubstituted indoles with all-carbon tethers and the subsequent aza-semipinacol rearrangement. The Heckreaction features a high C2-selectivity