The present invention relates to the stereoselective synthesis of (4aS,7aS)-octahydro-1H-pyrrolo [3, 4-b]pyridine, as well as the conversion thereof, to give Moxifloxacin. Particularly, the present invention relates to a method for the synthesis of (4aS,7aS)-octahydro-1H-pyrrolo[3, 4-b]pyridine of formula (I) comprising : (a) the optical resolution by enzymatic hydrolysis of the intermediate dialkyl-1-alkylcarbonylpiperidine-2,3-dicarboxylate racemate of formula (II) to give, following isolation, the intermediate dialkyl-(2S,3R)-1-alkylcarbonyl-piperidine-2,3-dicarboxylate of formula (III) in which AIk is a straight or branched C1-C5 alkyl group; (b) the conversion of the intermediate (III) to (4aR,7aS)-1-alkylcarbonylhexahydrofuro[3, 4-b]pyridine-5,7-dione of formula (IV) in which AIk has the meanings set forth above; (c) the conversion of the intermediate (IV) to (4aS,7as)-octahydro-1H-pyrrolo[3, 4-b]pyridine of formula (I) with an optical purity above 99%.
本发明涉及对(4aS,7aS)-八氢-1H-
吡咯[3,4-b]
吡啶的立体选择性合成,以及其转化为
莫西沙星的方法。特别地,本发明涉及一种合成式(I)中的(4aS,7aS)-八氢-1H-
吡咯[3,4-b]
吡啶的方法,包括:(a)通过酶解反应对中间体二烷基-1-烷基羰基
哌啶-2,3-二
羧酸酯外消旋体(II)进行光学分辨,得到分离后的式(I)中的二烷基-(2S,3R)-1-烷基羰基
哌啶-2,3-二
羧酸酯(III),其中AIk为直链或支链的C1-C5烷基;(b)将中间体(III)转化为式(I)中的(4aR,7aS)-1-烷基羰基六氢
呋喃[3,4-b]
吡啶-5,7-二酮(IV),其中AIk具有上述含义;(c)将中间体(IV)转化为光学纯度高于99%的式(I)中的(4aS,7aS)-八氢-1H-
吡咯[3,4-b]
吡啶。