[(S)-2-(4-Benzyloxy-phenyl)-1-((S)-5-oxo-tetrahydro-furan-2-yl)-ethyl]-carbamic acid tert-butyl ester → 5(S)-[1(S)-(Boc-amino)-2-(p-hydroxyphenyl)ethyl]dihydrofuran-2-(3H)-one
反応式
[C:1]([NH:8][C@H:9]([C@H:25]1[O:29][C:28](=[O:30])[CH2:27][CH2:26]1)[CH2:10][C:11]1[CH:16]=[CH:15][C:14]([O:17]CC2C=CC=CC=2)=[CH:13][CH:12]=1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2]>CO.[Pd]>[C:1]([NH:8][C@H:9]([C@H:25]1[O:29][C:28](=[O:30])[CH2:27][CH2:26]1)[CH2:10][C:11]1[CH:16]=[CH:15][C:14]([OH:17])=[CH:13][CH:12]=1)([O:3][C:4]([CH3:6])([CH3:7])[CH3:5])=[O:2]参加物
4
実験手順
Hydrogenating 3.0 g (7.29 mmol) of 5(S)-[1(S)-(Boc-amino)-2-(p-benzyloxyphenyl)ethyl]dihydrofuran-2-(3H)-one [preparation, see Example 1g)] in 100 ml of methanol with 0.6 g of 10% Pd/C results in the title compound, after filtering off the catalyst and evaporating the filtrate: tRet (II)=10.6 min.