HuagongsheHuagongshe Chemistry Print Report · For research reference only
Pyridine → (15alpha)-15-(Acetyloxy)-3-methoxyandrosta-3,5-dien-17-one
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Pyridine | HCID 1049 | — |
| Reactant | 2,2-Dimethoxypropane | HCID 6495 | — |
| Reactant | Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1) | HCID 466102 | — |
| Reactant | (15alpha)-15-(Acetyloxy)androst-4-ene-3,17-dione | HCID 57023990 | — |
| Solvent | Ethyl Acetate | HCID 8857 | — |
| Product | (15alpha)-15-(Acetyloxy)-3-methoxyandrosta-3,5-dien-17-one | HCID 54571005 | — |
Reaction Steps
10.0 g of 15α-acetoxy-4-androstene-3,17-dione is stirred under reflux with 60 ml of dimethoxypropane and 1.0 g of pyridinium-4-toluenesulfonate. After 5 hours, 1 ml of pyridine is added, the mixture is diluted with ethyl acetate, washed neutral with water, and dried. The crude product is recrystallized from hexane/acetone. Yield: 9.6 of 15α-acetoxy-3-methoxyandrosta-3,5-dien-17-one, mp 209° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US05236912 |
| Source dataset | uspto-grants-1993_08 |
| ORD ID | ord-4a11fbcb47bf475aaebc84d318a4be12 |
| Source note | uspto-grants-1993_08 |