作者:Mark Armitage、Guillaume Bret、Bernie M. Choudary、Mike Kingswood、Mike Loft、Steve Moore、Steve Smith、Michael W. J. Urquhart
DOI:10.1021/op300185s
日期:2012.10.19
an efficient manufacturing route to the SSRI-5-HT1A receptor antagonist 6-[(1-2-[(2-methyl-5-quinolinyl)oxy]ethyl}-4-piperidinyl)methyl]-2H-1,4-benzoxazin-3(4H)-one (SB-649915) 1 is described. The existing route to 1 involved coupling quinoline 6 with piperidine 5 and was considered lengthy as a consequence of the nine synthetic steps required to prepare 5. Two new routes to the key piperidine intermediate
SSRI-5-HT1A受体拮抗剂6-[[(1- 2-[(2-甲基-5-喹啉基)氧基]乙基} -4-哌啶基)甲基] -2的高效生产途径的发现和发展描述了H -1,4-苯并恶嗪-3(4 H)-1(SB-649915)1。现有的通往1的途径涉及将喹啉6与哌啶5偶联,由于制备5所需的九个合成步骤而被认为是冗长的。通往关键哌啶中间体5的两条新路线可以分别使用新颖的锂化法和Friedel-Crafts方法从容易获得的材料中分五步和两步分离出该化合物。这两种途径中的后者已成功地以5 L的规模进行了演示,可提供700 g的5。还描述了向喹啉6的替代物甲烷磺酸盐34的发展,是哌啶5与该甲烷磺酸盐34的最终烷基化反应,以输送SB-649915 1。