反応式
[C:1]([NH2:7])(=[O:6])[CH2:2][C:3]([CH3:5])=[O:4].[S:8](=O)(=[O:11])([OH:10])N>>[CH3:5][C:3]1[O:4][S:8](=[O:11])(=[O:10])[NH:7][C:1](=[O:6])[CH:2]=1参加物
3
実験手順
cyclizing the acetoacetamide derivative; the process comprises using, as the sulfamic acid derivative in stage (a), a salt of sulfamic acid which is at least partly soluble in the inert organic solvent employed, cyclizing the acetoacetamide-N-sulfonate formed in this stage or the free acetoacetamide-N-sulfonic acid in stage (b) by the action of an at least approximately equimolar amount of SO3, if appropriate in an inert inorganic or organic solvent, to give 6-methyl-3,4-dihydro-1,2,3-oxa-thiazin-4-one 2,2-dioxide, and then, if desired, also neutralizing with a base, in a stage (c), the product obtained here in the acid form.
後処理
- customformed in this stage
出典と根拠
- ORDレコード
- ord-a6387a52fe2d426d8c8d1b4273ed9d87
- 出典データセット
- uspto-grants-1989_02
- 特許番号
- US04804755
関連ノート
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