[CH3:1][S:2]([O:5][CH2:6][C@H:7]1[CH2:11][C@@H:10]([O:12][Si:13]([C:16]([CH3:19])([CH3:18])[CH3:17])([CH3:15])[CH3:14])[C@H:9](/[CH:20]=[CH:21]/[C@@H:22]([O:28][Si:29]([C:32]([CH3:35])([CH3:34])[CH3:33])([CH3:31])[CH3:30])[CH2:23][CH2:24][CH2:25][CH2:26][CH3:27])[C@H:8]1[CH2:36][C:37]1[CH:42]=[CH:41][CH:40]=[C:39]([O:43]CC2C=CC=CC=2)[CH:38]=1)(=[O:4])=[O:3].[OH-].[K+]>CO.[Pd]>[CH3:1][S:2]([O:5][CH2:6][C@H:7]1[CH2:11][C@@H:10]([O:12][Si:13]([C:16]([CH3:17])([CH3:18])[CH3:19])([CH3:15])[CH3:14])[C@H:9](/[CH:20]=[CH:21]/[C@@H:22]([O:28][Si:29]([C:32]([CH3:35])([CH3:34])[CH3:33])([CH3:30])[CH3:31])[CH2:23][CH2:24][CH2:25][CH2:26][CH3:27])[C@H:8]1[CH2:36][C:37]1[CH:42]=[CH:41][CH:40]=[C:39]([OH:43])[CH:38]=1)(=[O:4])=[O:3]A solution of ((1S,2S,3R,4R)-2-(3-(benzyloxy)benzyl)-4-(tert-butyldimethylsilyoxy)-3-((S,E)-3-(tert-butyldimethylsilyoxy)oct-1-enyl)cyclopentyl)methyl methanesulfonate (45 g, 0.06 mol) in dry methanol (450 ml) was treated with potassium hydroxide (9.72 g, 0.18 mol), then with 5% Pd/C (13.5 g, 30% wt) under hydrogen for 2 hr. Then, the reaction mixture was filtered with celite pad. The filtrate was concentrated to obtain crude product (50 g).
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