Hf(OTf)<sub>4</sub>-Catalyzed highly diastereoselective synthesis of 1,3-disubstituted tetralin derivatives via benzylic C(sp<sup>3</sup>)–H bond functionalization
作者:Taira Yoshida、Keiji Mori
DOI:10.1039/c7cc01717k
日期:——
A highly diastereoselective synthesis of 1,3-disubstituted tetralin derivatives was achieved via Hf(OTf)4-catalyzed benzylic C(sp3)-H bond functionalization.
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
[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.
different from those of picene and other methoxy picenes. In addition, crystalstructures of four types of methoxy-substituted picenes 4a–c,e strongly depend on their substitution position and number of methoxy groups, which dramatically changes the structures from the fully anisotropic 1D π-stacked structure to a unique 3D herringbone structure due to steric hindrance of methoxy groups. The calculations of
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