20-(5,5-Dimethyl-1,3-dioxan-2-yl)-1alpha,2alpha-epoxy-7alpha-methoxycarbonyloxypregn-5-en-3beta-yl acetate → 20-(5,5-Dimethyl-1,3-dioxan-2-yl)-1alpha, 2alpha-epoxypregna-5,7-dien-3beta-yl acetate
반응식
[C:1]([O:4][C@H:5]1[C@@H:31]2[O:32][C@@H:30]2[C@@:29]2([CH3:33])[C:7](=[CH:8][C@@H:9](OC(=O)NC)[C@@H:10]3[C@@H:28]2[CH2:27][CH2:26][C@@:25]2([CH3:34])[C@H:11]3[CH2:12][CH2:13][C@@H:14]2[CH:15]([CH:17]2[O:22][CH2:21][C:20]([CH3:24])([CH3:23])[CH2:19][O:18]2)[CH3:16])[CH2:6]1)(=[O:3])[CH3:2].C(O[C@H]1[C@@H]2O[C@@H]2[C@@]2(C)C(=C[C@@H](OC(OC)=O)[C@@H]3[C@@H]2CC[C@@]2(C)[C@H]3CC[C@@H]2C(C2OCC(C)(C)CO2)C)C1)(=O)C>>[C:1]([O:4][C@H:5]1[C@@H:31]2[O:32][C@@H:30]2[C@@:29]2([CH3:33])[C:7](=[CH:8][CH:9]=[C:10]3[C@@H:28]2[CH2:27][CH2:26][C@@:25]2([CH3:34])[C@H:11]3[CH2:12][CH2:13][C@@H:14]2[CH:15]([CH:17]2[O:18][CH2:19][C:20]([CH3:24])([CH3:23])[CH2:21][O:22]2)[CH3:16])[CH2:6]1)(=[O:3])[CH3:2]참가 물질
3
반응물 2
생성물 1
실험 절차
The procedure of Example 17 was repeated except that 43.5 mg (0.0798 mmole) of 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α,2α-epoxy-7α-(N-methylcarbamoyloxy)pregn-5-en-3β-yl acetate was used in lieu of 43.6 mg of 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α,2α-epoxy-7α-methoxycarbonyloxypregn-5-en-3β-yl acetate to give 16.6 mg of 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α, 2α-epoxypregna-5,7-dien-3β-yl acetate. In addition, 15.2 mg of 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α,2α-epoxy-7α-(N-methylcarbamoyloxy)pregn-5-en-3β-yl acetate was recovered. The yield of 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α,2α-epoxypregna-5,7-dien-3β-yl acetate was 68% based on consumed 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α,2α-epoxy-7α-(N-methylcarbamoyloxy)pregn-5-en-3β-yl acetate. The 1H-NMR spectrum of the product 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α,2α-epoxypregna-5,7-dien-3β-yl acetate was in agreement with that of the 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α,2α-epoxypregna-5,7-dien-3β-yl acetate obtained in Example 17.