Benzoyl isothiocyanate → N-(((3S,4R,5S)-3-(2,3-difluorophenyl)-4-(hydroxymethyl)-5-((trityloxy)methyl)tetrahydrofuran-3-yl)carbamothioyl)benzamide
Reaktionsgleichung
[C:1]([N:9]=[C:10]=[S:11])(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH2:12][C@@:13]1([C:41]2[CH:46]=[CH:45][CH:44]=[C:43]([F:47])[C:42]=2[F:48])[CH2:17][O:16][C@H:15]([CH2:18][O:19][C:20]([C:33]2[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=2)([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[C@H:14]1[CH2:39][OH:40]>C(Cl)Cl>[F:48][C:42]1[C:43]([F:47])=[CH:44][CH:45]=[CH:46][C:41]=1[C@@:13]1([NH:12][C:10]([NH:9][C:1](=[O:8])[C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)=[S:11])[C@H:14]([CH2:39][OH:40])[C@@H:15]([CH2:18][O:19][C:20]([C:33]2[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=2)([C:21]2[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=2)[C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[O:16][CH2:17]1Komponenten
4
Versuchsvorschrift
Benzoyl isothiocyanate (2.1 ml) was added to a solution of [(2S,3R,4S)-4-amino-4-(2,3-difluorophenyl)-2-((trityloxy)methyl)tetrahydrofuran-3-yl]methanol, obtained in Preparation Example 4-(23), (7.04 g) in DCM (26 ml) at 0° C. After stirring for 10 h and 50 mins at same temperature, the mixture was directly purified by silica gel column chromatography (gradient from 20% to 50% EtOAc in heptane) to afford the titled compound (9.47 g) as a pale yellow solid.