The First General Palladium Catalyst for the Suzuki−Miyaura and Carbonyl Enolate Coupling of Aryl Arenesulfonates
作者:Hanh Nho Nguyen、Xiaohua Huang、Stephen L. Buchwald
DOI:10.1021/ja036947t
日期:2003.10.1
for the palladium-catalyzed Suzuki-Miyaura and carbonyl enolate coupling of unactivated aryl arenesulfonates was developed utilizing XPhos, 1, and Pd(OAc)2. This is of significant interest because aryl tosylates and aryl benzenesulfonates are more easily handled and considerably less expensive than aryl triflates. This catalyst system effects the coupling of a variety of aryl, heteroaryl, and extremely
Antifungal and plant growth regulatory compounds of the formula ##STR1## in which R.sub.1 is alkyl, cycloalkyl or optionally substituted phenyl, and R.sub.2 is optionally substituted phenyl or benzyl.
Well-Defined, Air-Stable (NHC)Pd(Allyl)Cl (NHC = N-Heterocyclic Carbene) Catalysts for the Arylation of Ketones
作者:Mihai S. Viciu、Romain F. Germaneau、Steven P. Nolan
DOI:10.1021/ol026745m
日期:2002.11.1
A number of palladium-N-heterocycliccarbene (NHC) complexes were found to be active catalysts for the arylation of ketones. A large number of substrates, both aryl halides and ketones, are compatible with the reaction conditions. The ketone arylation reactions are achieved with low catalyst loading in short reaction times using aryl chlorides and triflates as reactive partners. [reaction: see text]
The effect of substituents in SRNl reactions. Some synthetic applications
作者:Joseph F. Bunnett、Eric Mitchel、Carlo Galli
DOI:10.1016/s0040-4020(01)97188-1
日期:1985.1
Most of the ortho effects are slight, but there is evidence that large ortho substituents hinder attachment of the phosphite more than the enolate nucleophile. The methoxy and diethoxyphosphoryl substituents, when para to the site of substitution, respectively favour and disfavour the phosphite with respect to the enolate ion. SRNl reactions of ortho-substituted halobenzenes are, for some substituents
The present disclosure is generally directed to antiviral compounds, and more specifically directed to compounds which can inhibit the function of the NS5A protein encoded by Hepatitis C virus (HCV), compositions comprising such compounds, and methods for inhibiting the function of the NS5A protein.