Enantioselective hydrogenation of α-ketoamides over Pt/Al2O3 modified by cinchona alkaloids
摘要:
Pyruvamide and its N-alkylated derivatives have been synthesised and hydrogenated enantioselectively to the corresponding alcohols over an alumina-supported Pt catalyst chirally modified by adsorbed cinchonidine. Depending on the substrate structure and reaction conditions, this catalyst system afforded ees up to 60%. This is the highest ee achieved hitherto with a solid catalyst in alpha-ketoamide hydrogenation. (C) 1997 Elsevier Science Ltd.
DOUBLE CARBONYLATION REACTIONS OF METHYL- AND PHENYLPALLADIUM(II) COMPLEXES IN THE PRESENCE OF SECONDARY AMINES AFFORDING α-KETO AMIDES
作者:Fumiyuki Ozawa、Akio Yamamoto
DOI:10.1246/cl.1982.865
日期:1982.6.5
The reactions of trans-PdR(X)(PMePh2)2 (R = Me, X = I and R = Ph, X = Br) with carbon monoxide in the presence of secondary amines, R’2NH, were found to give α-keto amides, RCOCONR’2, as double carbonylation products under mild conditions in good yields and selectivities.
发现反式 PdR(X)(PMePh2)2(R = Me,X = I 和 R = Ph,X = Br)与一氧化碳在仲胺 R'2NH 存在下的反应得到 α-酮酰胺,RCCOCONR'2,作为双羰基化产物在温和条件下以良好的产率和选择性。
Metal-Free Oxidative Amidation of 2-Oxoaldehydes: A Facile Access to α-Ketoamides
novel and efficient method for the synthesis of α-ketoamides, employing a dimethyl sulfoxide (DMSO)-promoted oxidative amidation reaction between 2-oxoaldehydes and amines under metal-free conditions is presented. Furthermore, mechanistic studies supported an iminium ion-based intermediate as a central feature of reaction wherein C1-oxygen atom of α-ketoamides is finally derived from DMSO.
The present disclosure is generally directed to antiviral compounds, and more specifically directed to combinations of compounds which can inhibit the function of the NS5A protein encoded by Hepatitis C virus (HCV), compositions comprising such combinations, and methods for inhibiting the function of the NS5A protein.
A mild, transition metal-free, and environmentally benign NBS-promoted C–N bond formation of N-heterocycles is successfully demonstrated. A series of heterocyclic derivatives are readily prepared under mild conditions in moderate to good yields.