By treatment with stabilized lithium phosphonates in the presence of activated 4Å molecular sieves, unprotected α-hydroxy ketones 1 undergo a convenient Horner-Wadsworth-Emmonsolefination to give directly butenolides 3 as exclusive or predominant products.
Combination Therapy for the Treatment of Urinary Frequency, Urinary Urgency and Urinary Incontinence
申请人:Gottesdiener Keith M.
公开号:US20090270406A1
公开(公告)日:2009-10-29
This invention concerns compositions for the treatment of urinary frequency, urinary urgency and urinary incontinence comprising (R)-N-[4-[2-[[2-hydroxy-2-(pyridin-3-yl)ethyl]amino]ethyl]phenyl]-4-[4-(4-tri-fluoromethylphenyl)thiazol-2-yl]benzenesulfonamide and pharmaceutically acceptable salts thereof. In another aspect, this invention concerns combination therapy for urinary frequency, urinary urgency and urinary incontinence wherein one of the active agents is (R)-N-[4-[2-[[2-hydroxy-2-(pyridin-3-yl)ethyl]amino]ethyl]phenyl]-4-[4-(4-tri-fluoromethylphenyl)thiazol-2-yl]benzenesulfonamide and pharmaceutically acceptable salts thereof.
A Volatile Lactone of<i>Hymenoscyphus pseudoalbidus</i>, Pathogen of European Ash Dieback, Inhibits Host Germination
作者:Christian A. Citron、Corina Junker、Barbara Schulz、Jeroen S. Dickschat
DOI:10.1002/anie.201402290
日期:2014.4.22
largely unknown secondary metabolism of the plant pathogenic fungus Hymenoscyphus pseudoalbidus was investigated by use of the CLSA method. A set of volatilelactones was identified by GC/MS. The lactones were synthesized and used in bioassays in which one of the compounds was found to be a strong germinationinhibitor for ash seeds, causing necroses in the plant tissue.
Pheromone synthesis. Part 264: Synthesis of the core 3-oxabicyclo[3.3.0]octane structures of gomadalactones A, B and C, the components of the contact sex pheromone of the white-spotted longicorn beetle, Anoplophora malasiaca
作者:Kenji Mori
DOI:10.1016/j.tet.2019.04.055
日期:2019.6
The core bicyclic cyclopentanelactone structures of gomadalactones A, B and C with α-hydroxyketone system were synthesized from (R)-pulegone, employing deconjugation of an α,β-unsaturated lactone as the key step. Comparison of the CD spectra of the synthetic compounds with those of the naturalproducts confirmed the absoluteconfiguration of the natural pheromone components as proposed in 2007. X-ray