20-(5,5-Dimethyl-1,3-dioxan-2-yl)-1alpha,3beta,7alpha-tris(methoxycarbonyloxy)pregn-5-ene → 20-(5,5-Dimethyl-1,3-dioxan-2-yl)-3beta-(tert-butyldimethylsilyl)oxy-1alpha-(methoxymethyl)oxypregn-5-en-7alpha-ol

反応式

[CH3:1][C:2]1([CH3:46])[CH2:7][O:6][CH:5]([CH:8]([C@@H:10]2[C@:27]3([CH3:28])[C@H:13]([C@H:14]4[C@H:24]([CH2:25][CH2:26]3)[C@:22]3([CH3:23])[C:17]([CH2:18][C@@H:19]([O:33][Si:34]([C:37]([CH3:40])([CH3:39])[CH3:38])([CH3:36])[CH3:35])[CH2:20][C@@H:21]3[O:29][CH2:30][O:31][CH3:32])=[CH:16][C@H:15]4[O:41]C(OC)=O)[CH2:12][CH2:11]2)[CH3:9])[O:4][CH2:3]1.CC1(C)COC(C([C@@H]2[C@]3(C)[C@H]([C@H]4[C@H](CC3)[C@]3(C)C(C[C@@H](OC(OC)=O)C[C@@H]3OC(OC)=O)=C[C@H]4OC(OC)=O)CC2)C)OC1>>[CH3:46][C:2]1([CH3:1])[CH2:3][O:4][CH:5]([CH:8]([C@@H:10]2[C@:27]3([CH3:28])[C@H:13]([C@H:14]4[C@H:24]([CH2:25][CH2:26]3)[C@:22]3([CH3:23])[C:17]([CH2:18][C@@H:19]([O:33][Si:34]([C:37]([CH3:40])([CH3:39])[CH3:38])([CH3:35])[CH3:36])[CH2:20][C@@H:21]3[O:29][CH2:30][O:31][CH3:32])=[CH:16][C@H:15]4[OH:41])[CH2:12][CH2:11]2)[CH3:9])[O:6][CH2:7]1