A Biocatalytic Synthesis of Heteroaromatic <i>N</i>‐Oxides by Whole Cells of <i>Escherichia coli</i> Expressing the Multicomponent, Soluble Di‐Iron Monooxygenase (SDIMO) PmlABCDEF
without any side oxidation products. This whole‐cell biocatalyst showed a high activity towards pyridines, pyrazines, and pyrimidines. It was also capable of oxidizing bulky N‐heterocycles with two or even three aromatic rings. Being entirely biocatalytic, our approach provides an environmentally friendly and mild method for the production of aromatic N‐oxides avoiding the use of strong oxidants, organometallic
Reactions between Weinreb Amides and 2-Magnesiated Oxazoles: A Simple and Efficient Preparation of 2-Acyl Oxazoles
作者:Daniel J. Pippel、Christopher M. Mapes、Neelakandha S. Mani
DOI:10.1021/jo070646a
日期:2007.7.1
Treatment of oxazole or 5-aryl oxazoles with i-PrMgCl smoothly generates the corresponding 2-Grignard reagents, which react with Weinreb amides to provide exclusively 2-acyl oxazole products.
Discovery of a Potent, Selective, and Efficacious Class of Reversible α-Ketoheterocycle Inhibitors of Fatty Acid Amide Hydrolase Effective as Analgesics
作者:Dale L. Boger、Hiroshi Miyauchi、Wu Du、Christophe Hardouin、Robert A. Fecik、Heng Cheng、Inkyu Hwang、Michael P. Hedrick、Donmienne Leung、Orlando Acevedo、Cristiano R. W. Guimarães、William L. Jorgensen、Benjamin F. Cravatt
DOI:10.1021/jm049614v
日期:2005.3.1
Herein we report the discovery of a potent, selective, and efficacious class of reversible FAAH inhibitors that produce analgesia in animal models validating a new therapeutic target for pain intervention. Key to the useful inhibitordiscovery was the routine implementation of a proteomics-wide selectivity screen against the serine hydrolase superfamily ensuring selectivity for FAAH coupled with systematic
methods for the introduction of CF2H into heteroarenes. Herein we disclose a new strategy for the direct introduction of a difluoromethyl group into heteroarenes via the copper-mediated C-H oxidative difluoromethylation of heteroarenes with TMSCF2H. This mild and regioselective method enables the convenient synthesis of a range of difluoromethylated heteroarenes in high yields. The usage of 9,10-phenanthrenequinone
Improved competitive inhibitors of FAAH employ an α-keto heterocyclic pharmacophore and a binding subunit having a ?-unsaturation. The α-keto heterocyclic pharmacophore and a binding subunit are attached to one another, preferably by a hydrocarbon chain. The improvement lies in the use of a heterocyclic pharmacophore selected from oxazoles, oxadiazoles, thiazoles, and thiadiazoles that have alkyl or aryl substituents at their 4 and/or 5 positions. The improved competitive inhibitors of FAAH display enhanced activity over conventional competitive inhibitors of FAAH.