发明授权
US5120847A Process for iodinating or brominating the .alpha.-methylenic carbon of a secondary amide 失效
二次酰胺(ALPHA) - 甲基二氧化碳的改性或改性方法

Process for iodinating or brominating the .alpha.-methylenic carbon of a
secondary amide
摘要:
A novel, facile, and specific process for .alpha.-iodinating or .alpha.-brominating the .alpha.-methylenic carbon of a straight chain, branched chain, or cyclic secondary amide, such as a lactam or an azasteroid, comprises reacting the amide with trialkylsilyl-X (R.sub.3 Si--X), where X is Br, I, or Cl, and R is methyl, ethyl, or n-propyl, in the presence of I.sub.2 or Br.sub.2. The .alpha.-iodo- or .alpha.-bromo-amide is useful for making the .alpha.,.beta.-unsaturated amide through dehydrohalogenation.
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