Phenanthroline-<i><sup>t</sup></i>BuOK Promoted Intramolecular C–H Arylation of Indoles with ArI under Transition-Metal-Free Conditions
作者:Xiang-Huan Shan、Bo Yang、Hong-Xing Zheng、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1021/acs.orglett.8b03449
日期:2018.12.21
variety of substituted 6H-isoindolo [2, 1-a] indoles were prepared by a simple and efficient intramolecular cyclization using 1,10-phenanthroline in the presence of potassium tert-butoxide and chlorobenzene. This strategy provides a fast and versatile access to isoindolo[2,1-a]indole derivatives for the synthesis of pharmaceuticals and organic electroluminescent (EL) materials.
已经开发出第一个实例,菲咯啉t BuOK促进了N-(2-碘苄基)吲哚的分子内自由基C–H芳基化,而没有过渡金属的参与。在叔丁醇钾和氯苯存在下,使用1,10-菲咯啉通过简单有效的分子内环化反应制备了多种取代的6 H-异吲哚并[2,1-a]吲哚。该策略为异吲哚并[2,1- a ]吲哚衍生物的合成提供了快速而通用的途径,用于合成药物和有机电致发光(EL)材料。
Synthesis of Ring-Fused Oxazolo- and Pyrazoloisoquinolinones by a One-Pot Pd-Catalyzed Carboxamidation and Aldol-Type Condensation Cascade Process
作者:Gagan Chouhan、Howard Alper
DOI:10.1021/jo9010574
日期:2009.8.21
three-component cascade process is described for the synthesis of ring-fused oxazolo- and pyrazoloisoquinolinones by a one-pot carboxamidation/aldol-type condensation reaction. The cascade process involves Pd-catalyzed carboxamidation of an aryl halide/active methylene compound with oxazolidinone or pyrazolidinone, and subsequent intramolecular base-catalyzed cyclization/dehydration through an aldol-type
CuSO<sub>4</sub>-Catalyzed dual annulation to synthesize O, S or N-containing tetracyclic heteroacenes
作者:Xiang-Huan Shan、Bo Yang、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1039/d0cc01172j
日期:——
In this work, CuSO4 is utilized as a practical redox catalyst for tandem dual annulation in the synthesis of indole-fused tetracyclic heteroacenes, which are important skeletons in both medicinal chemistry and materials chemistry.
Pd(II)-Catalyzed Synthesis of Benzocyclobutenes by β-Methylene-Selective C(sp<sup>3</sup>)–H Arylation with a Transient Directing Group
作者:Philip A. Provencher、John F. Hoskin、Jonathan J. Wong、Xiangyang Chen、Jin-Quan Yu、K. N. Houk、Erik J. Sorensen
DOI:10.1021/jacs.1c09368
日期:2021.12.8
functionalization is a significant hurdle that remains to be addressed in the field of Pd(II) catalysis. We report a Pd(II)-catalyzed synthesis of benzocyclobutenes by methylene-selective C(sp3)–Harylation of ketones. The reaction utilizes glycine as a transient directing group and a 2-pyridone ligand, which may govern the methylene selectivity by making intimate molecular associations with the substrate during concerted
Construction of 1,3-Dithio-Substituted Tetralins by [1,5]-Alkylthio Group Transfer Mediated Skeletal Rearrangement
作者:Naoya Hisano、Yuto Kamei、Yaoki Kansaku、Masahiro Yamanaka、Keiji Mori
DOI:10.1021/acs.orglett.8b01610
日期:2018.7.20
A novel skeletal rearrangement involving a [1,5]-alkylthio group transfer/cyclization sequence is described. Treatment of benzylidene malonates having a thioketal moiety at the homobenzyl position with a catalytic amount of Sc(OTf)3 afforded alkylthio group rearrangedadducts in good chemical yields. Detailed investigation of the reaction mechanism revealed that an intramolecular conjugate addition/ring