Photochemical synthesis of diaza-steroids
✍ Scribed by Andrzej Frankowski; Jacques Streith
- Book ID
- 103401879
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- French
- Weight
- 572 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0040-4020
No coin nor oath required. For personal study only.
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of Kentucky, Lexing-influence the yield of the photocyclization. Thus, no diazaboraphenanthrene was formed on irridation when the mixture of 2-aminopyridine and (diphenyl)chloroborane was stirred for only 45 minutes; allowing for reaction times of more than 150 minutes, however, produced the desire
## Abstract The UV. irradiation of 17 β‐hydroxy‐2‐aza‐4‐androsten‐3‐one **(1)**, __N__‐methyl‐17 β‐hydroxy‐2‐aza‐4‐androsten‐3‐one **(3)**, 17 β‐hydroxy‐4‐aza‐5 β‐androst‐1‐en‐3‐one **(2)** and __N__‐methyl‐17 β‐hydroxy‐4‐aza‐5 β‐androst‐1‐en‐3‐one **(4)**, gives rise to 1,10‐__seco__ (from **1** a