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CAS No.: | 6870-94-6 |
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Name: | Pregna-1,4-diene-3,20-dione,11,17-dihydroxy-6-methyl-, (6a,11b)- |
Article Data: | 4 |
Molecular Structure: | |
Formula: | C22H30 O4 |
Molecular Weight: | 358.478 |
Synonyms: | Pregna-1,4-diene-3,20-dione,11b,17-dihydroxy-6a-methyl- (6CI,7CI,8CI); 11b,17a-Dihydroxy-6a-methylpregna-1,4-diene-3,20-dione; NSC 125051 |
Density: | 1.21g/cm3 |
Melting Point: | 222-231℃ |
Boiling Point: | 530.3°C at 760 mmHg |
Flash Point: | 288.6°C |
PSA: | 74.60000 |
LogP: | 2.83120 |
Conditions | Yield |
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ueber mehrere Stufen; |
methylprednisolone acetate
A
11β,17α-dihydroxy-6α-methyl-1,4-pregnadiene-3,20-dione
B
11β-hydroxy-6α-methyl-1,4-androstadiene-3,17-dione
Conditions | Yield |
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Product distribution; Rate constant; Irradiation; radiolytic degradation; |
11β,17α-dihydroxy-6α-methyl-1,4-pregnadiene-3,20-dione
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: sulfuric acid / tetrahydrofuran / pH 2 - 3 2: D-glucose; potassium dihydrogenphosphate / water; methanol / 50 h View Scheme |
11β,17-dihydroxy-6α-methyl-pregn-4-ene-3,20-dione
11β,17α-dihydroxy-6α-methyl-1,4-pregnadiene-3,20-dione
Conditions | Yield |
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With potassium dihydrogenphosphate; D-glucose In methanol; water for 50h; |
17-hydroxy-pregn-4-ene-3,11,20-trione
11β,17α-dihydroxy-6α-methyl-1,4-pregnadiene-3,20-dione
Conditions | Yield |
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Multi-step reaction with 6 steps 1: trimethyloxosulfonium bromide; orthoformic acid triethyl ester / 5 h 2: sodium tetrahydroborate / tetrahydrofuran / 12 h 3: phthalic anhydride; dihydrogen peroxide / ethyl acetate / 6 h 4: magnesium / tetrahydrofuran / 4 h 5: sulfuric acid / tetrahydrofuran / pH 2 - 3 6: D-glucose; potassium dihydrogenphosphate / water; methanol / 50 h View Scheme |
3,3;20,20-bis-ethanediyldioxy-17-hydroxy-pregn-5-en-11-one
11β,17α-dihydroxy-6α-methyl-1,4-pregnadiene-3,20-dione
Conditions | Yield |
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Multi-step reaction with 5 steps 1: sodium tetrahydroborate / tetrahydrofuran / 12 h 2: phthalic anhydride; dihydrogen peroxide / ethyl acetate / 6 h 3: magnesium / tetrahydrofuran / 4 h 4: sulfuric acid / tetrahydrofuran / pH 2 - 3 5: D-glucose; potassium dihydrogenphosphate / water; methanol / 50 h View Scheme |
3,3;20,20-bis-ethanediyldioxy-pregn-5-ene-11β,17-diol
11β,17α-dihydroxy-6α-methyl-1,4-pregnadiene-3,20-dione
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: phthalic anhydride; dihydrogen peroxide / ethyl acetate / 6 h 2: magnesium / tetrahydrofuran / 4 h 3: sulfuric acid / tetrahydrofuran / pH 2 - 3 4: D-glucose; potassium dihydrogenphosphate / water; methanol / 50 h View Scheme |
11β,17α-dihydroxy-6α-methyl-1,4-pregnadiene-3,20-dione
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: magnesium / tetrahydrofuran / 4 h 2: sulfuric acid / tetrahydrofuran / pH 2 - 3 3: D-glucose; potassium dihydrogenphosphate / water; methanol / 50 h View Scheme |
11β,17α-dihydroxy-6α-methyl-1,4-pregnadiene-3,20-dione
acetic acid
methylprednisolone acetate
Conditions | Yield |
---|---|
Stage #1: 11β,17α-dihydroxy-6α-methyl-1,4-pregnadiene-3,20-dione With iodine; calcium oxide In methanol; dichloromethane Stage #2: acetic acid With potassium acetate In acetone at 45 - 50℃; for 2h; |