| 摘要 |
An improved process for the dealkylation of alkyl aryl ethers to aryl phenols is provided. In this process, an alkyl aryl ether, such as a methyl ether of an opioid, is contacted with an aqueous acid selected from HBr, HCl, or HI which contains at least one equivalent weight, based on the ether, of boric acid or an inorganic salt of a metal selected from Li, Na, K, Al, Mg, Ca, Mn and Ni. MgBr2 in aqueous HBr is preferred in dealkylating an N-substituted 14-hydroxydihydronorcodeine.
|
