专利名称:Process for the preparation of unsaturated
cyclic ketones
发明人:WILD, HANS-JAKOB, DR.申请号:EP107011.2申请日:190419公开号:EP03394A3公开日:19901128
摘要:The present invention relates to a kind of methods, are used for gamma-pyrone, i.e. the preparation of its compound of formula....Wherein R<1>indicates methylor ethyl....formula I are known odorous substance and flavourings....process feature is akind of compound of formula....Wherein R<1>has above-mentioned meaning, the benzoylthat R<2>indicates alkanoyl or selectively replaces, and R<3>indicates free radical....Wherein R<4>and R<5>indicates lower alkyl, particularly methyl or hydroxyl, is limitedby the pyranone cyclization in an acid medium, is, the reaction product of formula....Wherein R<1>and R<2>has above-mentioned meaning,..It is the application hydrolysisunder alkaline condition.
申请人:L. GIVAUDAN & CIE SOCIETE ANONYME
地址:CH-1214 Vernier-Genève CH
国籍:CH
代理机构:Urech, Peter, Dr.
更多信息请下载全文后查看
因篇幅问题不能全部显示,请点此查看更多更全内容
Copyright © 2019- huatuo0.com 版权所有 湘ICP备2023021991号-1
违法及侵权请联系:TEL:199 1889 7713 E-MAIL:2724546146@qq.com
本站由北京市万商天勤律师事务所王兴未律师提供法律服务