申请人:Hoffmann-La Roche Inc.
公开号:US03984427A1
公开(公告)日:1976-10-05
Vinyl ketones and Mannich-bases obtained therefrom are useful as intermediates in the total synthesis of steroids having valuable pharmacological properties. These compounds are prepared by the low temperature reaction of a vinyl Grignard e.g., vinyl magnesium chloride with substituted .gamma., .delta. or .epsilon. lactones followed, if desired, by reaction of the vinyl ketone obtained with a primary or secondary amine. Particular compounds prepared by this procedure include 2-(2-substituted aminoethyl)-6-substituted-2-hydroxy-tetrahydropyrans and the tautomers thereof.
乙烯酮和由此得到的曼尼希碱在合成具有有价值药理特性的类固醇的过程中作为中间体是有用的。这些化合物通过乙烯格氏试剂(例如乙烯镁氯化物)与取代的γ、δ或ε内酯的低温反应制备得到,随后,如果需要,再将得到的乙烯酮与一级或二级胺反应。通过这种方法制备的特定化合物包括2-(2-取代氨基乙基)-6-取代-2-羟基四氢吡喃及其互变异构体。