![](/CAS/GIF/37413-99-3.gif)
9,11-Epoxy-16-methylpregna-1,4-dien-17-ol-3,20-dione synthesis
- Product Name:9,11-Epoxy-16-methylpregna-1,4-dien-17-ol-3,20-dione
- CAS Number:37413-99-3
- Molecular formula:C22H28O4
- Molecular Weight:356.46
![Pregn-9(11)-en-20-one, 16,17-epoxy-3-hydroxy-, (3β,5α,16α)- (9CI)](/CAS/20210305/GIF/884488-47-5.gif)
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Yield:-
Steps:
Multi-step reaction with 5 steps
1.1: 95 percent / pyridine / 20 °C
2.1: 70 percent / triethyl orthoformate; p-toluenesulfonic acid / CH2Cl2 / 20 h / 20 °C
3.1: 72 percent / tetrahydrofuran; diethyl ether / 72 h / 60 °C
4.1: m-iodoxybenzoic acid; diphenyl diselenide / toluene / 22 h / Heating
4.2: 50 percent / p-toluenesulfonic acid / CH2Cl2 / 4 h / 20 °C
5.1: perchloric acid; 1,3-dibromo-5,5-dimethylhydantoin / dimethylformamide / 3 h / cooling
5.2: 75.8 percent / sodium hydroxide / CH2Cl2; methanol; H2O / 2 h / cooling
References:
Kongkathip, Ngampong;Kongkathip, Boonsong;Noimai, Naratitt [Synthetic Communications,2006,vol. 36,# 7,p. 865 - 874]
![16-Methylpregna-1,4,9(11)-trien-17-ol-3,20-dione](/CAS/GIF/14135-32-1.gif)
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![Pregn-9(11)-en-20-one, 3-(acetyloxy)-16,17-epoxy-, cyclic 20-(1,2-ethanediyl acetal), (3β,5α,16α)- (9CI)](/CAS/20211123/GIF/884488-48-6.gif)
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![3beta-hydroxy-5alpha-pregna-9(11),16-dien-20-one 3-acetate](/CAS/GIF/21650-83-9.gif)
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![9,11-Epoxy-16-methylpregna-1,4-dien-17-ol-3,20-dione](/CAS/GIF/37413-99-3.gif)
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