Carbon Dioxide → 4-methyl-1H-indazole-5-carboxylic acid
反応式
Br[C:2]1[C:3]([CH3:11])=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][N:6]=[CH:5]2.C([Li])(C)(C)C.[C:17](=[O:19])=[O:18]>>[CH3:11][C:3]1[C:2]([C:17]([OH:19])=[O:18])=[CH:10][CH:9]=[C:8]2[C:4]=1[CH:5]=[N:6][NH:7]2参加物
4
実験手順
This compound was prepared in a manner similar to the preparation of 88 using commercially available 4-bromo-2,3-dimethylaniline as starting material. After an acylation step, N-(4-bromo-2,3-dimethylphenyl)acetamide was treated with isoamyl nitrite, then 10% aqueous HCl to yield 5-bromo-4-methyl-1H-indazole. 5-bromo-4-methyl-1H-indazole was treated with t-butyl lithium and carbon dioxide to yield 4-methyl-1H-indazole-5-carboxylic acid, which in turn was treated with thiosemicarbazide and polyphorsphoric acid to form 5-(4-methyl-1H-indazol-5-yl)-1,3,4-thiadiazol-2-amine. MS (API-ES) m/z (%): 232 (100%, M++1).
出典と根拠
- ORDレコード
- ord-2ae63fcf4c264166a75dd44b2c33a0f8
- 出典データセット
- uspto-grants-2010_04
- 特許番号
- US07700636B2
反応ノート
読み込み中…