cis-aminochromanols are obtained in high yield and with high selectivity over their trans counterparts by hydrogenating the corresponding oximes in the presence of a catalyst and an acid selected from HBr, HCl, and organic sulfonic acid. The cis-aminochromanols can be employed as intermediates in the production of HIV protease inhibitors which are useful for treating HIV infection and AIDS.
Process for preparing hydroxychomanones and CIS-aminochromanols
申请人:——
公开号:US20020095047A1
公开(公告)日:2002-07-18
Enantiomerically enriched hydroxychromanones are obtained by the AlCl
3
-catalyzed intramolecular Friedel-Crafts acylation of the corresponding 3-phenoxy-2-alkylcarbonyloxy-propionic acid followed by cleavage of the carboxylate in the presence of an alkali metal peroxide or hydroperoxide. Enantiomerically enriched cis-aminochromanols can then be prepared by treating the hydroxychromanones with a hydroxylamine and hydrogenating the resulting oxime. The cis-aminochromanols can be employed as intermediates in the production of HIV protease inhibitors which are useful for treating HIV infection and AIDS.
Boggs, Roger A.; Hasan, Fariza B.; Mahoney, J. Barry, Journal of the Chemical Society. Perkin transactions II, 1992, # 8, p. 1271 - 1277
作者:Boggs, Roger A.、Hasan, Fariza B.、Mahoney, J. Barry、Mehta, Avi C.、Palumbo, Catherine M. K.、et al.
DOI:——
日期:——
Process for preparing hydroxychomanones and cis-aminochromanols
申请人:Merck & Co., Inc.
公开号:US06531617B2
公开(公告)日:2003-03-11
Enantiomerically enriched hydroxychromanones are obtained by the AlCl3-catalyzed intramolecular Friedel-Crafts acylation of the corresponding 3-phenoxy-2-alkylcarbonyloxy-propionic acid followed by cleavage of the carboxylate in the presence of an alkali metal peroxide or hydroperoxide. Enantiomerically enriched cis-aminochromanols can then be prepared by treating the hydroxychromanones with a hydroxylamine and hydrogenating the resulting oxime. The cis-aminochromanols can be employed as intermediates in the production of HIV protease inhibitors which are useful for treating HIV infection and AIDS.