Compounds having the formula
are hepatitis C (HCV) polymerase inhibitors. Also disclosed are a composition and method for inhibiting hepatitis C (HCV) polymerase, processes for making the compounds, and synthetic intermediates employed in the processes.
Readily Removable Directing Group Assisted Chemo- and Regioselective C(sp<sup>3</sup>)H Activation by Palladium Catalysis
作者:Yun-Fei Zhang、Hong-Wei Zhao、Hui Wang、Jiang-Bo Wei、Zhang-Jie Shi
DOI:10.1002/anie.201505932
日期:2015.11.9
Currently used directing groups for selective aliphatic β‐functionalization of carbonyl compounds show excellent reactivity and selectivity with an amide as a linker. Described herein is 2‐piconimide, used for the first time with commercially available 2‐picolinamide/2‐picolic acid as precursors, to directCH arylation/alkenylation by palladium catalysis. The directing group is essential for promoting
Nickel-Catalyzed Site-Selective Alkylation of Unactivated C(sp<sup>3</sup>)–H Bonds
作者:Xuesong Wu、Yan Zhao、Haibo Ge
DOI:10.1021/ja413131m
日期:2014.2.5
The direct alkylation of unactivated sp(3) C-H bonds of aliphatic amides was achieved via nickel catalysis with the assist of a bidentate directing group. The reaction favors the C-H bonds of methyl groups over the methylene C-H bonds and tolerates various functional groups. Moreover, this reaction shows a predominant preference for sp(3) C-H bonds of methyl groups via a five-membered ring intermediate
The Pd(II)-catalyzedC–Hbond activation/C–Nbond cleavage annulation reaction of N-alkyoxyamide aryne is developed to synthesize 9,10-dihydrophenanthrenone derivatives. This reaction exhibited good functional group compatibility with yields up to 92%. Detailed mechanistic studies showed that the key to C–Nbond cleavage is the formed eight-membered palladacycle intermediate undergoing nucleophilic
despite the recent advances in the fields of both C–H and C–C bond activation. Herein, we report a palladium-catalyzed migrative carbofluorination of saturated amides enabled by the activation of both the C(sp3)–H and the Cquaternary–Cσ bonds. In this transformation, the α-quaternary carbon of Weinreb amides is converted to α-tertiary fluoride with concurrent migration of an aryl or an amido group from