Hydrochloric Acid → HCID 178461366, Verbindung
Reaktionsgleichung
C[C@@H:2]1[CH2:7][CH2:6][CH2:5][CH2:4][C@H:3]1[NH:8][C:9]([C@@H:11]1[CH2:13][C@H:12]1[C:14]([OH:16])=O)=[O:10].B(OC)(OC)O[CH3:19].C1COCC1.Cl>>[CH3:19][C@H:6]1[CH2:7][CH2:2][C@H:3]([NH:8][C:9]([C@@H:11]2[CH2:13][C@H:12]2[CH2:14][OH:16])=[O:10])[CH2:4][CH2:5]1Komponenten
5
Versuchsvorschrift
Stir a solution, under argon, at 0° C., of trans-2-(trans-2-methylcyclohexylcarbamoyl)-cyclopropanecarboxylic acid (Example 11b) (3.69 g, 16.4 mmol), trimethyl borate (5.6 mL, 50 mmol), and add slowly 2N borane dimethylsulfide complex in THF (16.4 mL, 32.8 mmol). Continue to stir the reaction at 0° C. for 1 h, and then at ambient temperature for 2 h. Carefully pour the reaction mixture into ice-H2O and acidify with 2N HCl. Extract the mixture with EtOAc (3 times), wash with brine, dry over MgSO4 and concentrate to obtain 2.85 g (83%) of product as a solid.