## Abstract The preparation of 21‐diazoprogesterone‐6,7‐^3^H~2~ is described. Progesterone was dehydrogenated with chloranil to give Δ^6^‐dehydroprogesterone. Degradation of the pregnane side‐chain with sodium hypobromite gave the corresponding carboxylic acid. Catalytic reduction with carrier‐free
A facile chemical synthesis of 2 - hydroxyestrone - 6, 7 - 3H
✍ Scribed by J. A. Menzies; P. Toft; H. Watanabe
- Publisher
- John Wiley and Sons
- Year
- 1972
- Tongue
- French
- Weight
- 129 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0022-2135
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## Abstract A general synthetic approach to pyrazolo[4,3‐__d__]pyrimidines is reported. Aldehydes, arylideneanilines, carboxylic acids and orthoesters are used as one‐carbon units for bridging the two amino functions of 4‐amino‐1‐alkyl‐3‐propylpyrazole‐5‐carboxamides.
## Abstract 2,7‐Diazapyrene is synthesized in three high‐yield steps from commercially available 1,4,5,8‐naphthalene tetracarboxylic dianhydride, which first reacts with concentrated ammonium hydroxide solution at room temperature to give 1,4,5,8‐naphthalenetetracarboxylic diimide (96%). The latter
## Abstract For Abstract see ChemInform Abstract in Full Text.