[C:1]([O:5][C:6](=[O:10])[C@@H:7]([CH3:9])[NH2:8])([CH3:4])([CH3:3])[CH3:2].[CH2:11](Br)[CH:12]=[CH2:13].C(N(CC)CC)C>C1(C)C=CC=CC=1>[C:1]([O:5][C:6](=[O:10])[C@@H:7]([CH3:9])[NH:8][CH2:13][CH:12]=[CH2:11])([CH3:4])([CH3:3])[CH3:2]D-Alanine t-butylester (68) is treated with one equivalent allyl bromide and one equivalent of triethylamine in toluene under reflux. The solvent is evaporated and the product is purified by flash chromatography on silica gel to give (69).
Wird geladen…