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Hydrochloric Acid → 2,6-Dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid monomethyl ester
関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|---|---|---|
| 反応物 | Hydrochloric Acid | HCID 313 | — |
| 反応物 | Dichloromethane | HCID 6344 | — |
| 反応物 | Sodium Hydroxide | HCID 14798 | — |
| 反応物 | 3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-, 3-(2-cyanoethyl) 5-methyl ester | HCID 10916009 | — |
| 溶媒 | Acetone | HCID 180 | — |
| 生成物 | 2,6-Dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid monomethyl ester | HCID 173322 | — |
反応手順
Next, a solution of NaOH (41.3 mL of 35% NaOH in 375 mL H2O) was slowly added to a solution of 2,6-dimethyl-3-carbomethoxy-4-(3-nitrophenyl)-5-(2-cyano)ethoxycarbonyl-1,4-dihydropyridine (80 g, 0.21 mol) in acetone (240 mL). Then, CH2Cl2 (500 mL) was added and 12N HCl (41.3 mL) slowly introduced. The resulting precipitate was filtered and recrystallized from dimethylformamide/H2O (175 mL DMF, 72 mL H2O) to yield 2,6-dimethyl-3-carbomethoxy-4-(3-nitrophenyl)-5-carboxy-1,4-dihydropyridine (mp=242° C.).
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 特許番号 | US04761420 |
| 出典データセット | uspto-grants-1988_08 |
| ORD ID | ord-edbf78708faf4c909cf5147bfc5e8c4b |
| 出典メモ | uspto-grants-1988_08 |