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    • 4. 发明授权
    • Chiral reductions of imines leading to the syntheses of optically active
amines
    • 亚胺的手性还原导致光学活性胺的合成
    • US5648541A
    • 1997-07-15
    • US535469
    • 1995-09-28
    • Bradford C. VanWagenenRobert M. Barmore
    • Bradford C. VanWagenenRobert M. Barmore
    • C07C209/44C07C209/52C07C211/27C07C211/29C07C211/30C07C213/02C07C215/46C07C217/54C07C227/04C07C229/38C07C231/18C07C237/30C07C253/30C07C255/58
    • C07C209/52
    • A process for preparing an R enantiomer of a compound of the formula (I): ##STR1## wherein Ar is 3-methoxyphenyl, 3-chlorophenyl, or 1-naphthyl, and X is independently selected from the group consisting of H, F, Cl, Br, I, phenyl, CF.sub.3, CF.sub.2 H, CFH.sub.2, lower alkyl (e.g., Me), O-lower alkyl (e.g., OMe), OCH.sub.2 CF.sub.3, OH, CN, NO.sub.2, C(O)-lower alkyl (e.g., C(O)Me), C(O)O-lower alkyl (e.g., C(O)OMe), C(O)NH-lower alkyl (e.g., C(O)NH--Me), C(O)N-lower alkyl.sub.2 (e.g., C(O)NMe.sub.2), OC(O)-lower alkyl (e.g., OC(O)Me), and NH--C(O)-lower alkyl (e.g., NH--C(O)Me), where "lower alkyl" is selected from a group consisting of 1 to 6 carbon atoms, and m is an integer between 1 and 5, by asymmetrically and enantioselectively reducing an imine with a reducing agent/chiral auxiliary agent complex so as to produce an enantiomeric excess of R enantiomer of the compound of formula (I) over the S enantiomer of the compound of formula (I). The process is especially useful to produce compounds (R)-(+)-N-[1-(3-methoxyphenyl)ethyl]-3-(2-chlorophenyl)propanamine and (R)-(+)-N-[1-(3-methoxyphenyl)ethyl]-3-(phenyl)propanamine. Enantiomeric excess of the R enantiomer over S enantiomer of greater than 65% have been achieved.
    • 制备式(I)化合物的R对映异构体的方法:其中Ar是3-甲氧基苯基,3-氯苯基或1-萘基,X独立地选自H ,F,Cl,Br,I,苯基,CF 3,CF 2 H,CFH 2,低级烷基(例如Me),O-低级烷基(例如OMe),OCH 2 CF 3,OH,CN,NO 2,C(O) (例如C(O)Me),C(O)O-低级烷基(例如C(O)OMe),C(O)NH-低级烷基(例如C(O)NH-Me) O)N-低级烷基2(例如C(O)NMe 2),OC(O) - 低级烷基(例如OC(O)Me)和NH-C(O) - 低级烷基(例如,NH-C O)Me),其中“低级烷基”选自1至6个碳原子,m为1至5之间的整数,通过用还原剂/手性助剂络合物不对称和对映选择性还原亚胺,因此 以便在式(I)化合物的S对映异构体上产生式(I)化合物的对映异构体的对映异构体。 该方法特别适用于制备化合物(R) - (+) - N- [1-(3-甲氧基苯基)乙基] -3-(2-氯苯基)丙胺和(R) - (+) - N- [ - (3-甲氧基苯基)乙基] -3-(苯基)丙胺。 R对映异构体超过S对映异构体的对映体过量已达到大于65%。