Improved synthesis of13C,2H3- and2H3-salmeterol by Cs2CO3-mediated monoalkylation of a primary amine
作者:Tadeusz F. Molinski、Scott D. Stanley
DOI:10.1002/jlcr.595
日期:2002.8
An abbreviated synthesis of isotopically labelled salmeterol has been achieved. The key improvement utilizes a highly selective Cs2CO3-mediated one-pot alkylation of benzylamine by 6-bromo-1-(4′-phenylbutoxy)hexane to prepare the limiting reagent, 6-N-benzylamino-1-(4′-phenylbutoxy)hexane without overalkylation. The method was applied to synthesis of the title compounds in >97 at% isotopic purity. Copyright © 2002 John Wiley & Sons, Ltd.
实现了同位素标记的沙美特罗的简易合成。关键的改进是利用 Cs2CO3 介导的 6-溴-1-(4′-苯基丁氧基)己烷对苄胺进行高选择性的一锅烷基化反应,制备限制试剂 6-N-苄基氨基-1-(4′-苯基丁氧基)己烷,而不会发生过烷基化反应。该方法用于合成同位素纯度大于 97% 的标题化合物。Copyright © 2002 John Wiley & Sons, Ltd. All Rights Reserved.