20-(5,5-Dimethyl-1,3-dioxan-2-yl)-1alpha,2alpha-epoxypregna-5,7-dien-3beta-ol → 1alpha,2alpha-Epoxy-3beta-hydroxypregna-5,7-diene-20-carbaldehyde
Reaktionsgleichung
CC1(C)CO[CH:5]([CH:8]([C@@H:10]2[C@:27]3([CH3:28])[C@H:13]([C:14]4[C@H:24]([CH2:25][CH2:26]3)[C@:22]3([CH3:23])[C:17]([CH2:18][C@@H:19]([OH:30])[C@@H:20]5[O:29][C@@H:21]53)=[CH:16][CH:15]=4)[CH2:12][CH2:11]2)[CH3:9])[O:4]C1.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](O)[C@@H]5O[C@@H]53)=C[C@H]4O)CC2)C)OC1>>[O:29]1[C@H:20]2[C@H:19]([OH:30])[CH2:18][C:17]3[C@:22]([CH3:23])([C@@H:21]12)[C@@H:24]1[C:14]([C@H:13]2[C@:27]([CH3:28])([CH2:26][CH2:25]1)[C@@H:10]([CH:8]([CH:5]=[O:4])[CH3:9])[CH2:11][CH2:12]2)=[CH:15][CH:16]=3Komponenten
3
Versuchsvorschrift
The procedure of Example 36 was repeated except that 2.2 mg (0.005 mmole) of 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α,2α-epoxypregna-5,7-dien-3β-ol was used in lieu of 2.2 mg of 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α,2α-epoxypregn-5-ene-3β,7α-diol to give 1.0 mg of 1α,2α-epoxy-3β-hydroxypregna-5,7-diene-20-carbaldehyde (yield: 58%).