Trimethyl orthoformate → 5-Chloro-2-(1H-tetrazol-1-yl)benzoic acid
反応式
[NH2:1][C:2]1[CH:10]=[CH:9][C:8]([Cl:11])=[CH:7][C:3]=1[C:4]([OH:6])=[O:5].[CH:12](OC)(OC)OC.[N-:19]=[N+:20]=[N-:21].[Na+]>C(O)(=O)C>[Cl:11][C:8]1[CH:9]=[CH:10][C:2]([N:1]2[CH:12]=[N:21][N:20]=[N:19]2)=[C:3]([CH:7]=1)[C:4]([OH:6])=[O:5]参加物
5
実験手順
A suspension of 2-amino-5-chloro-benzoic acid (5.0 g, 0.029 mol), trimethyl orthoformate (9.5 mL, 0.087 mol) and sodium azide (5.6 g, 0.087 mol) in glacial acetic acid (105 mL) was stirred at room temperature for 2 h. Filtration and concentration from toluene gave 5-chloro-2-(1H-tetraazol-1-yl)benzoic acid (4.0 g, 62%); 1H NMR (400 MHz, CD3OD): δ 9.47 (s, 1H), 8.16 (d, J=2.5 Hz, 1H), 7.83 (dd, J=2.5, 8.5 Hz, 1H), 7.62 (d, J=8.5 Hz, 1H).
後処理
- filtrationFiltration and concentration from toluene
出典と根拠
- ORDレコード
- ord-ebf805073e75491ca120c7f871ee2006
- 出典データセット
- uspto-grants-2006_12
- 特許番号
- US07144899B2
反応ノート
読み込み中…