2-Amino-5-methylthiazole → 2,6-Dimethyl-4-hydroxy-N-(5-methyl-2-thiazolyl)-2H-1,2-benzothiazine-3-carboxamide-1,1-dioxide

HRID 224599ノート

反応式

HRID 224599 の反応式
[OH:1][C:2]1[C:7]2[CH:8]=[C:9]([CH3:12])[CH:10]=[CH:11][C:6]=2[S:5](=[O:14])(=[O:13])[N:4]([CH3:15])[C:3]=1[C:16]([O:18]C)=O.[NH2:20][C:21]1[S:22][C:23]([CH3:26])=[CH:24][N:25]=1>C1(C)C(C)=CC=CC=1>[CH3:15][N:4]1[C:3]([C:16]([NH:20][C:21]2[S:22][C:23]([CH3:26])=[CH:24][N:25]=2)=[O:18])=[C:2]([OH:1])[C:7]2[CH:8]=[C:9]([CH3:12])[CH:10]=[CH:11][C:6]=2[S:5]1(=[O:13])=[O:14]

参加物

4

反応物 2

HCID 3517702-Amino-5-methylthiazoleHCID 54696079methyl 4-hydroxy-2,6-dimethyl-2H-1,2-benzothiazine-3-carboxylate-1,1-dioxide

生成物 1

HCID 546942212,6-Dimethyl-4-hydroxy-N-(5-methyl-2-thiazolyl)-2H-1,2-benzothiazine-3-carboxamide-1,1-dioxide

試薬・触媒・溶媒 1

HCID 7237O-Xylene溶媒

実験手順

4.0 gm (14 millimols) of methyl 4-hydroxy-2,6-dimethyl-2H-1,2-benzothiazine-3-carboxylate-1,1-dioxide and 2.0 gm (17 millimols) of 2-amino-5-methyl-thiazole were refluxed in 200 ml of anhydrous xylene for 24 hours. After cooling, the crystals which had separated out were filtered off. After recrystallization from ethylene chloride 3.6 gm (70% of theory) of 2,6-dimethyl-4-hydroxy-N-(5-methyl-2-thiazolyl)-2H-1,2-benzothiazine-3carboxamide-1,1-dioxide were obtained.

後処理

  1. temperatureAfter cooling
  2. customthe crystals which had separated out
  3. filtrationwere filtered off
  4. customAfter recrystallization from ethylene chloride 3.6 gm (70% of theory) of 2,6-dimethyl-4-hydroxy-N-(5-methyl-2-thiazolyl)-2H-1,2-benzothiazine-3carboxamide-1,1-dioxide
  5. customwere obtained

出典と根拠

ORDレコード
ord-193861cfc36a487aa1ee9cd683e467d0
出典データセット
uspto-grants-1980_11
特許番号
US04233299

反応ノート

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