[EN] INTERMEDIATES FOR THE PREPARATION OF (3INTERMÉDIAIRES POUR LA PRÉPARATION DE (3R,4S)-1-(4-FLUOROPHÉNYL)-3-[(3S)-3-(4-FLUOROPHÉNYL)-3-HYDROXYPROPYL)]-4-(4-HYDROXYPHÉNYL)-2-AZÉTIDINONE20090903WO0034240A1SCHERING CORP [US]20000615WY1-37YWO2006086562A2MICROBIA INC [US], et al20060817293,294,301,308Y1-37YWO2007119106A2MEDICHEM SA [ES], et al20071025WDY1-37DYWO2007120824A2TEVA PHARMA [IL], et al20071025Win particular claim 34DY1-37DY<br/>[FR] INTERMÉDIAIRES POUR LA PRÉPARATION DE (3R,4S)-1-(4-FLUOROPHÉNYL)-3-[(3S)-3-(4-FLUOROPHÉNYL)-3-HYDROXYPROPYL)]-4-(4-HYDROXYPHÉNYL)-2-AZÉTIDINONE
申请人:ZENTIVA KS
公开号:WO2009106021A1
公开(公告)日:2009-09-03
A method for the preparation of (S)-alcohol oxazolidides of general formula II, in which PG represents hydrogen or a hydroxyl protecting group, such as trimethylsilyl, tert-butyldimethylsilyl, benzyloxycarbonyl, tert-butoxycarbonyl, benzyl, benzhydryl or trityl, in which a ketal oxazolidide of general formula III, where PG has the same meaning as above and R means an alkyl with 1-4 carbon atoms, linear or branched, such as methyl, ethyl, isopropyl or butyl, or R+R together represents a divalent alkyl, or substituted with 1 or 2 alkyl groups, e.g. 1,2-ethylene, 1,2-propylene, 1,2-butylene, 1,3-propylene or 2,2-dimethyl-l,3- propylene, is deprotected by the action of acidic reagents in a mixture of water and a water- miscible solvent in the temperature range of 0 to 100 °C (stage A), and the obtained ketone oxazolidide of general IV, in which PG has the same meaning as above, is reduced with asymmetrical reagents in an inert organic solvent in the temperature range of -30 to +40 °C (stage B).
一种制备通式II的(S)-醇噁唑烷酮的方法,其中PG代表氢或羟基保护基,如三甲基硅基、叔丁基二甲基硅基、苄氧羰基、叔丁氧羰基、苄基、苄基甲基或三苄基,其中通式III的酮缩噁唑烷醚,其中PG具有与上述相同的含义,R表示具有1-4个碳原子的直链或支链烷基,如甲基、乙基、异丙基或丁基,或R+R一起表示二价烷基,或用1或2个烷基取代,例如1,2-乙烯、1,2-丙烯、1,2-丁烯、1,3-丙烯或2,2-二甲基-1,3-丙烯,通过在0到100°C温度范围内的水和水溶性溶剂混合物中使用酸性试剂脱保护(阶段A),并且在惰性有机溶剂中在-30到+40°C温度范围内用不对称试剂还原通式IV的得到的酮缩噁唑烷醚,其中PG具有与上述相同的含义(阶段B)。