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
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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]
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