[EN] OXADIAZOLONES AS TRANSIENT RECEPTOR POTENTIAL CHANNEL INHIBITORS<br/>[FR] OXADIAZOLONES EN TANT QU'INHIBITEURS DE CANAL POTENTIEL RÉCEPTEUR TRANSITOIRE
申请人:HOFFMANN LA ROCHE
公开号:WO2018096159A1
公开(公告)日:2018-05-31
The invention relates to compounds of formula (I) and pharmaceutically acceptable salts thereof. In addition, the present invention relates to methods of manufacturing and methods of using the compounds of formula (I) as well as pharmaceutical compositions containing such compounds. The compounds may be useful in treating diseases and conditions mediated by TRPA1, such as pain.
Purines. LX. Dimroth Rearrangement and Concomitant Hydrolytic Deamination of 7-Alkyl-1-methyladenines.
作者:Tozo FUJII、Tohru SAITO、Ryoko II、Tomoko SUZUKI
DOI:10.1248/cpb.42.382
日期:——
The Dimroth rearrangement of 7-alkyl-1-methyladenines (8) to produce 7-alkyl-N6-methyladenines (9) (63-72% yield) has been found to be accompanied with unusual hydrolytic deaminations to give 7-alkyl-1-methylhypoxanthines (10) (1-3.5%) and/or 7-alkylhypoxanthines (11) (12-22%), when effected in boiling H2O for 4-70 h. Probable pathways leading to these by-products are proposed.
The extract of Vicia faba beans is prepared by soaking beans in distilled water overnight and then boiling in a water bath to reduce the volume of aqueous extract, which is then homogenized and filtered. The filtrate is concentrated to a smaller volume, lyophilized, and powdered. The lyophilized powder is extracted with hexane to remove oils and lipids. The oil-free lyophilized powder is dissolved in ethanol solvent and extracted for eight hours under reflux, and filtered. The volume of ethanol is reduced by a rotary evaporator, and a first off-white precipitate (sample A-1) is collected, washed with ethanol, and dried at 80° C. Mass spectrometry shows a molecular weight of 200.16447 g mol−1, and an empirical formula of C9H16N2O3 is assigned. Intraperitoneal injection of mice with 50 mg/kg of A-1 twenty minutes prior to injection with strychnine protected the mice from strychnine-induced convulsions to the same extent as phenobarbitone (phenobarbital).