电脑开机显示黑屏英文:孕二烯酮 [CAS:60282-87-3]合成路线图解??有机化学网
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药物详细合成路线
Chemical Name: 13-Ethyl-17-hydroxy-18,19-dinor-17alpha-pregna-4,15-dien-20-yn-3-one Generic Name: 孕二烯酮;Gestodene Other Names: Gestodene;SH-546;SHB-331 CAS: 60282-87-3 Formula: C21H26O2 Mole Weight: 310.44017 structure:Route 2 Ketals (IIIa-b) can also be treated with trimethylsilyl chloride in pyridine to give the trimethylsilyl derivative (VIa-b), which is then treated with ethynylmagnesium bromide (B) and oxalic acid (C) in methanol.
Route 3 Ketals (IIIa-b) can also be acetylated with acetic anhydride in pyridine to the acetate (VIIa-b), which is then treated with ethynylmagnesium bromide (B) and oxalic acid (C) in methanol.
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