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Pyridine → 3,5-dimethyl-1-pyridin-2-yl-1H-pyrazole-4-carboxylic acid ethyl ester
関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|---|---|---|
| 反応物 | Pyridine | HCID 1049 | — |
| 反応物 | 2-Hydrazinopyridine | HCID 78645 | — |
| 反応物 | Ethyl 2-acetylacetoacetate | HCID 79063 | — |
| 溶媒 | Ethanol | HCID 702 | — |
| 生成物 | 3,5-dimethyl-1-pyridin-2-yl-1H-pyrazole-4-carboxylic acid ethyl ester | HCID 9856256 | — |
反応手順
Similar to Example 1, 2-pyridylhydrazine (7.5 mmol, 0.8 g) and 2-acetyl-3-oxo-butyric acid ethyl ester (7.5 mmol, 1.3 g) were mixed in a solution of 50% pyridine in ethanol, then heated under reflux. The solvents were removed under vacuum and the residue purified over silica. The named product crystallized upon standing (m.p. 49° C.-50° C.).
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 特許番号 | US06569885B1 |
| 出典データセット | uspto-grants-2003_05 |
| ORD ID | ord-d01bbee3b31c41f8a1f6a7be019434ad |
| 出典メモ | uspto-grants-2003_05 |