PRODUCTION OF CHIRALLY PURE AMINO ALCOHOL INTERMEDIATES, DERIVATIVES THEREOF, AND USES THEREOF
申请人:Sellstedt John
公开号:US20100016639A1
公开(公告)日:2010-01-21
A method of selectively preparing a chiral 2S-amino alcohol useful in preparation of an amide sulfonated or acylated with alkyl, substituted aryl or substituted heteroaryl is described. The method involves reacting a di-tert-butyl diazene-1,2-dicarboxylate with a (4S)-4-benzyl-3-[(S)-trifluoromethyl-alkyl substituted alkanoyl]-1,3-oxazolidin-2-one to afford a di-tert-butyl 1-(1S,2S)-([(4S)-4-benzyl-2-oxo-1,3-oxazolidine-3-yl]-carbonyl}-trifluoromethyl-alkyl substituted alkyl)hydrazine-1,2-dicarboxylate. This dicarboxylate is then reduced to yield di-tert-butyl 1-(1S,2S)-[trifluoromethyl-alkyl substituted alkyl]hydrazine-1-(hydroxymethyl)-1,2-dicarboxylate. The resulting product is deblocked with an acid to yield the acid addition salt of (2S,3S)-trifluoro-hydrazino-methyl alkan-1-ol. The acid addition salt of (2S,3S)-trifluoro-2-hydrazino-methyl alkan-1-ol is hydrogenated in the presence of a suitable metal catalyst to yield the amino alcohol (2S,3S)-2-amino-trifluoro-methyl alkan-1-ol HCl.
本文介绍了一种选择性制备手性2S-氨基醇的方法,该方法可用于制备与烷基、取代芳基或取代杂环基乙酰化或磺化的酰胺。该方法涉及将双叔丁基重氮-1,2-二甲酯与(4S)-4-苄基-3-[(S)-三氟甲基-烷基取代的酰基]-1,3-噁唑啉-2-酮反应,得到双叔丁基1-(1S,2S)-[(4S)-4-苄基-2-氧代-1,3-噁唑啉-3-基]-酰基-三氟甲基-烷基取代的烷基)肼-1,2-二甲酯。然后将该二甲酯还原,得到双叔丁基1-(1S,2S)-[三氟甲基-烷基取代的烷基]肼-1-(羟甲基)-1,2-二甲酯。将得到的产物用酸去保护基,得到(2S,3S)-三氟甲基肼甲基烷-1-醇的酸加成盐。将(2S,3S)-三氟甲基肼甲基烷-1-醇的酸加成盐在适当的金属催化剂存在下加氢,得到氨基醇(2S,3S)-2-氨基-三氟甲基烷基烷-1-醇盐酸盐。