Triazole compounds with an oxazolidine ring were designed and synthesized as a potential inhibitor of the fungal cytochrome P450 14 alpha-demethylase. In testing for antifungalactivity against a mouse systemic Candida albicans infection, (4R,5R)-3-acyl-4-methyloxazolidine derivatives 4 exhibited remarkably high efficacy after oral or parenteral dosing. The potent activity of 4 is hypothesized to be
An α‐Cyclopropanation of Carbonyl Derivatives by Oxidative Umpolung
作者:Adriano Bauer、Giovanni Di Mauro、Jing Li、Nuno Maulide
DOI:10.1002/anie.202007439
日期:2020.10.5
nucleophiles is often associated with umpolung and cationic mechanisms. Herein, we report a general process converting a range of ketone derivatives into α‐cyclopropanated ketones by oxidative umpolung. Mechanistic investigation and careful characterization of side products revealed that the reaction follows an unexpected pathway and suggests the intermediacy of non‐classical carbocations.
framework of ate complex mechanism, suggesting formation of pentacoordinated titanium ate species as a prerequisite of high enantiocontrol. Asymmetric Kulinkovich cyclopropanation of carboxylic esters with prochiral alkenes is reported. The process is mediated by titanium(IV) (4R,5R)-TADDOLate complexes and affords correspondingly (Z)- or (E)-cyclopropanols with up to 84–87% ee in the event of intra- or
Hydroxamic acid derivatives of 3-Phenyl propionic acids useful as therapeutic agents for treating anthrax poisoning
申请人:Johnson Alan T.
公开号:US20080188566A1
公开(公告)日:2008-08-07
Compounds having the formula
wherein the symbols have the meaning described in the specification are hydroxamic acid derivatives of 3-phenyl-propionic acid and capable of inhibiting the lethal effects of infection by anthrax bacteria and are useful in the treatment of poisoning by anthrax.
Free radical additions of hydrogen donor solvents to tert-butyl perpent-4-enoate have given 4-substituted γ-butyrolactones, with yields of 50 % or greater. Such reactions applied to allyl-tert-butyl peroxide have produced 2,3-epoxypropanation of these solvents. Similar addition-elimination processes occurred with tert-butyl 4-methyl-perpent-4-enoate, tert-butyl 2,2-dimethyl-perpent-4-enoate and tert-butyl-methallyl