2-Aminothiophenol → 2-phenyl-4H-1,4-benzothiazin-3-one

HRID 17857

反応式

HRID 17857 の反応式
[C:1]1([CH:7]2[CH2:12][NH:11][C:10]3[CH:13]=[CH:14][CH:15]=[CH:16][C:9]=3[S:8]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C[O:18]C(=O)C(Br)C1C=CC=CC=1.NC1C=CC=CC=1S>CN(C=O)C.CCOC(C)=O.O>[C:1]1([CH:7]2[C:12](=[O:18])[NH:11][C:10]3[CH:13]=[CH:14][CH:15]=[CH:16][C:9]=3[S:8]2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

参加物

7

反応物 3

HCID 87132-AminothiophenolHCID 137806Benzeneacetic acid, alpha-bromo-, methyl esterHCID 130715212-Phenyl-3,4-dihydro-2H-1,4-benzothiazine

生成物 1

HCID 2347682-phenyl-4H-1,4-benzothiazin-3-one

試薬・触媒・溶媒 3

HCID 962Water溶媒HCID 6228Dimethylformamide溶媒HCID 8857Ethyl Acetate溶媒

実験手順

2-Phenyl-3,4-dihydro-2H-1,4-benzothiazine: To bromo-phenyl-acetic acid methyl ester (4.88 g, 21 mmol) in DMF (15 mL) under an argon atmosphere was added 2-amino-benzenethiol (2.3 mL, 21 mmol) and the reaction was stirred at rt overnight. The reaction mixture was diluted with EtOAc (5 mL) and water (50 mL) and the crude product was collected by filtration, washed with warm EtOAc, and dried to give 2-phenyl-4H-1,4-benzothiazin-3-one as a white solid (3.49 g). LC/MS m/z 242 (M+H)+. To this intermediate (3.48 g, 14.4 mmol) in THF (50 mL) under an argon atmosphere was added 1M BH3.THF (50 mL, 50 mmol) and the reaction was stirred at rt overnight. The reaction was quenched with 1N HCl and extracted with ether. The combined organic fractions were dried over MgSO4 and concentrated. 201A was purified by recrystallization from hot EtOAc/hexanes to yield pale pink crystals (1.5 g). LC/MS m/z 228.2 (M+H)+.

後処理

  1. filtrationthe crude product was collected by filtration
  2. washwashed with warm EtOAc
  3. customdried

出典と根拠

ORDレコード
ord-49218633147e48a494a0093576d6d942
出典データセット
uspto-grants-2010_06
特許番号
US07741317B2

関連ノート

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