Tetrahydrofuran → (2S)-Cyclopentyl-(4-methylphenyl)acetic acid

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C1COCC1.C(N(CC)CC)C.[CH2:13]1[CH2:17][CH2:16][CH2:15][CH:14]1[CH:18]([C:22]1[CH:27]=[CH:26][C:25]([CH3:28])=[CH:24][CH:23]=1)[C:19]([OH:21])=[O:20]>O>[CH:14]1([C@@H:18]([C:22]2[CH:27]=[CH:26][C:25]([CH3:28])=[CH:24][CH:23]=2)[C:19]([OH:21])=[O:20])[CH2:15][CH2:16][CH2:17][CH2:13]1

참가 물질

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온도: 60 °C

실험 절차

2.4 l of THF and 129.7 g (1.28 mol) of triethylamine are added, with stirring, to a suspension of 560 g (2.57 mol) of the compound from Example I in 4.8 l of water. The resulting solution is heated to 60° C., 155.4 g (1.28 mmol) of (S)-(-)-phenethylamine are added and the resulting suspension is stirred for 2 h at 60° C. The reaction mixture is cooled to 20° C., the precipitate is filtered off by suction, washed with 2.4 l of water/THF (2:1) and dried under reduced pressure.