| 摘要 |
A process for the preparation of esters of anhydroecgonine having formula (I), any of its enantiomers or any mixture thereof, or a salt thereof, wherein R is alkyl, or optionally substituted aryl, or arylalkyl; comprising the step of reacting a compound of formula (II), any of its enantiomers or any mixture thereof, or a salt thereof, wherein R<1> is hydrogen, alkyl-CO-, or optionally substituted aryl-CO-, or arylalkyl-CO-; with an alcoholate RO<->, M<+> wherein R is as defined above and M<+> is a counter ion, followed by isolation of the resulting compound either as the base or, if desired, in the form of a salt thereof.
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