| 摘要 |
From compounds of formula II wherein R<SUB>1 </SUB>and R<SUB>2 </SUB>are independently of one another H, C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>halogenalkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkoxy, C<SUB>1</SUB>-C<SUB>6</SUB>alkoxy-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, or C<SUB>1</SUB>-C<SUB>6</SUB>alkoxy-C<SUB>1</SUB>-C<SUB>6</SUB>alkyloxy, R<SUB>3 </SUB>is C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, and R<SUB>5 </SUB>is C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>hydroxyalkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkoxy-C<SUB>1</SUB>-C<SUB>6</SUB>-alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkanoyloxy-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>aminoalkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkylamino-C<SUB>1</SUB>-C<SUB>6</SUB>-alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>-dialkylamino-C<SUB>1</SUB>-C<SUB>6</SUB>-alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>-alkanoylamido-C<SUB>1</SUB>-C<SUB>6</SUB>-alkyl, HO(O)C-C<SUB>1</SUB>-C<SUB>6</SUB>-alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkyl-O-(O)C-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, H<SUB>2</SUB>N-C(O)-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkyl-HN-C(O)-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl or (C<SUB>1</SUB>-C<SUB>6</SUB>alkyl)<SUB>2</SUB>N-C(O)-C<SUB>1</SUB>-C<SUB>6</SUB>-alkyl, R<SUB>6 </SUB>is C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, R<SUB>7 </SUB>is C<SUB>1</SUB>-C<SUB>6</SUB>alkyl or C<SUB>1</SUB>-C<SUB>6</SUB>alkoxy, or R<SUB>6 </SUB>and R<SUB>7 </SUB>together are tetramethylene, pentamethylene, 3-oxa-1,5-pentylene or -CH<SUB>2</SUB>CH<SUB>2</SUB>O- substituted, if necessary, with C<SUB>1</SUB>-C<SUB>4</SUB>-Alkyl, phenyl or benzyl, it is possible-through halolactonization, azidation of the halogen group, ring opening with an amine R<SUB>5</SUB>-NH<SUB>2</SUB>, and reduction of the azide group to form the amino group-to prepare compounds of formula I wherein R<SUB>5 </SUB>is C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>hydroxyalkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkoxy-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkanoyloxy-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>aminoalkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkylamino-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>dialkylamino-C<SUB>1</SUB>-C<SUB>6</SUB>alkanoylamido-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, HO(O)C-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkyl-O-(O)C-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, H<SUB>2</SUB>N-C(O)-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl, C<SUB>1</SUB>-C<SUB>6</SUB>alkyl-HN-C(O)-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl or (C<SUB>1</SUB>-C<SUB>6</SUB>alkyl)<SUB>2</SUB>-N-C(O)-C<SUB>1</SUB>-C<SUB>6</SUB>alkyl. If 2(S),7(R)-diastereomer of formula II is used, the 2(S),4(S),5(S),7(S)-diastereomer of formula Ia is obtained in a high degree of purity.
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