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    • 21. 发明授权
    • Process for preparing benzyl carbazates
    • 制备苄基肼基甲酸酯的方法
    • US6160160A
    • 2000-12-12
    • US369818
    • 1999-08-06
    • Edwin RitzerRobert SollnerClaus DreisbachFrank Jelitto
    • Edwin RitzerRobert SollnerClaus DreisbachFrank Jelitto
    • C07C281/02C07C261/00
    • C07C281/02
    • The present invention relates to a process for preparing optionally substituted benzyl carbazates of formula (I) ##STR1## wherein each R.sup.1 independently represents C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, di(C.sub.1 -C.sub.4 -alkyl)amino, nitro, halogen, hydroxyl, the group X-R.sup.3, wherein X represents O or S and R.sup.3 represents straight-chain or branched C.sub.1 -C.sub.4 -alkyl, the group COOR.sup.4, wherein R.sup.4 represents C.sub.1 -C.sub.4 -alkyl, the group NR.sup.5 R.sup.6, wherein R.sup.5 and R.sup.6 independently represent C.sub.1 -C.sub.4 -alkyl, or a C.sub.3 -C.sub.6 -cycloalkyl group that is optionally substituted by straight-chain or branched C.sub.1 -C.sub.4 -alkyl groups, andn is an integer from 0 to 5,by reacting a dialkyl carbonate with an optionally substituted benzyl alcohol in the presence of a catalyst, separating off the resulting reaction mixture from the catalyst, and subsequently reacting the separated reaction mixture with hydrazine hydrate.
    • 本发明涉及制备任选取代的式(I)苄基肼基甲酸酯的方法,其中每个R 1独立地表示C 1 -C 4烷基,C 1 -C 4 - 烷氧基,二(C 1 -C 4 - 烷基)氨基,硝基,卤素,羟基 基团X-R3,其中X表示O或S,R 3表示直链或支链C 1 -C 4 - 烷基,COOR 4基团,其中R 4表示C 1 -C 4 - 烷基,NR 5 R 6基团,其中R 5和R 6独立地表示 C 1 -C 4 - 烷基或任选被直链或支链C 1 -C 4 - 烷基取代的C 3 -C 6环烷基,n是0至5的整数,碳酸二烷基酯与任选取代的 苄醇在催化剂存在下分离得到的反应混合物,然后使分离的反应混合物与水合肼反应。
    • 24. 发明授权
    • Method for racemic biochemical resolution of CIS-and
trans-pyprolopiperidine
    • CIS和反式哌啶的外消旋生化分解方法
    • US6153414A
    • 2000-11-28
    • US485083
    • 2000-02-03
    • Claus Dreisbach
    • Claus Dreisbach
    • C07D471/04C12P17/18C12P41/00
    • C07D471/04C12P17/182C12P41/007
    • Cis- and trans-pyrrolopiperidines are advantageously separated into their optical isomers when monoacylating by enzymatic process a mixture containing (R,R)- and (S,S)-pyrrolopiperidine or (S,R)- and (R,S)-pyrrolopiperidine, thereby obtaining a mixture (I) containing (R,R)- and (S,S)-6-acyl-pyrrolopiperidine or (S,R)- and (R,S)-6-acyl-pyrrolopiperidine. Said mixture (I) is then again acylated by enzymatic process, thereby obtaining a mixture (II) containing (S,S)-1,6-diacyl- and (R,R)-6-acyl-pyrrolipiperidine or (S,R)-1,6-diacyl- and (R,S)-6-acyl-pyrrolopiperidine; the enzyme and optionally the solvent and the excess acylating agent are separated from the mixture (II), and the rest is treated with aqueous acid, and the (S,S)-1,6-diacyl-pyrrolopiperidine or the (S,R)-1,6-diacyl-pyrrolopiperidine is separated by extraction and the extraction residue is alkalinized, and the (R,R)-6-acyl-pyrrolopiperidine or the (R,S)-6-acyl-pyrrolopiperidine is separated by extraction. From these acylated isomer-free derivatives, the free base can optionally be prepared according to the usual methods for separating acylated groups.
    • PCT No.PCT / EP98 / 04820 Sec。 371日期2000年2月3日 102(e)日期2000年2月3日PCT提交1998年8月1日PCT公布。 出版物WO99 /​​ 09200 日期1999年2月25日当通过酶法将含有(R,R) - 和(S,S) - 吡咯基哌啶或(S,R) - 和(R)的混合物的混合物单酰化时,反式 - 吡咯并吡啶有利地分离成它们的旋光异构体 ,S) - 吡咯并哌啶,由此得到含有(R,R) - 和(S,S)-6-酰基 - 吡咯并哌啶或(S,R) - 和(R,S) 吡咯环哌啶。 然后通过酶法再次酰化所述混合物(I),由此得到含有(S,S)-1,6-二酰基和(R,R)-6-酰基 - 吡咯烷基哌啶或(S,R )-1,6-二酰基 - 和(R,S)-6-酰基 - 吡咯并哌啶; 将酶和任选的溶剂和过量的酰化剂从混合物(II)中分离,其余的用酸水溶液处理,(S,S)-1,6-二酰基 - 吡咯哌啶或(S,R )-1,6-二酰基 - 吡咯并哌啶通过萃取分离,萃取残余物碱化,(R,R)-6-酰基 - 吡咯并哌啶或(R,S)-6-酰基 - 吡咯并哌啶通过萃取分离 。 从这些酰化异构体衍生物中,游离碱可以根据通常的分离酰化基团的方法任选地制备。