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    • 2. 发明授权
    • Sequential benzylic oxidations of the naloxone ring system
    • 纳洛酮环体系的连续苄基氧化
    • US6166211A
    • 2000-12-26
    • US520099
    • 2000-03-07
    • Gary A. CainSpencer Drummond, Jr.
    • Gary A. CainSpencer Drummond, Jr.
    • C07D489/02C07D489/08
    • C07D489/08C07D489/02Y02P20/55
    • The present invention pertains to a process for the preparation of the 10-keto analogs of morphinan compounds. In the case of compounds having a 3-hydroxyl group, the 3-methyl ether protected analog is synthesized by selective phenolic methylation in the presence of the basic amino group. When nalbuphine, morphine, or codeine is used as the starting material, the additional 6-hydroxyl group is protected using acetylation. The protected analog is selectively oxidized by treatment with cerium ammonium nitrate to provide the 10-(S)-hydroxy adduct. The 10-(S)-hydroxy adduct is further oxidized to the 10-keto analog. Any protecting groups that were added prior to oxidation are cleaved subsequent to oxidation to form the desired 10-ketomorphinan.
    • 本发明涉及制备吗啡喃化合物的10-酮类似物的方法。 在具有3-羟基的化合物的情况下,3-甲基醚保护的类似物在碱性氨基存在下通过选择性酚甲基化合成。 当使用纳布啡,吗啡或可待因作为起始原料时,使用乙酰化保护额外的6-羟基。 通过用硝酸铈铵处理选择性地氧化受保护的类似物以提供10-(S) - 羟基加合物。 将10-(S) - 羟基加合物进一步氧化成10-酮类似物。 在氧化之前加入的任何保护基在氧化后被切割以形成所需的10-酮吗啡喃。