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Acetic Acid → 2-[2-(Pyrrolidin-1-yl)ethylthio]methyl-3,5-dicarboethoxy-4-(m-nitrophenyl)-6-methyl-1,4-dihydropyridine
関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|---|---|---|
| 反応物 | Acetic Acid | HCID 176 | — |
| 反応物 | 1-(2-Chloroethyl)pyrrolidine hydrochloride | HCID 81668 | — |
| 反応物 | Sodium ethoxide | HCID 2723922 | — |
| 反応物 | 2-Mercaptomethyl-3,5-dicarboetoxy-4-(m-nitrophenyl)-6-methyl-1,4-dihydropyridine | HCID 11675833 | — |
| 溶媒 | Ethanol | HCID 702 | — |
| 生成物 | 2-[2-(Pyrrolidin-1-yl)ethylthio]methyl-3,5-dicarboethoxy-4-(m-nitrophenyl)-6-methyl-1,4-dihydropyridine | HCID 19831186 | 41.8% |
反応手順
A solution of 2-(pyrrolidin-1-yl)-1-chloroethane hydrochloride (2.8 g), 2-mercaptomethyl-3,5-dicarboethoxy-4-(m-nitrophenyl) -6-methyl-1,4-dihydropyridine (5.4 g) and sodium ethoxide (2 g) in ethanol (70 ml) is heated to the reflux temperature for 6 hours, then it is neutralized with AcOH and evaporated under reduced pressure. The residue, after the usual work-up, is purified by column-chromatography (SiO2 ; 210 g; eluent AcOH/MeOH 99/1) to give 2.8 g of 2-[2-(pyrrolidin-1-yl)ethylthio]methyl-3,5-dicarboethoxy-4-(m-nitrophenyl) -6-methyl-1,4-dihydropyridine, as an oil, that upon treatment with fumaric acid gives the corresponding salt, m.p. 192°-194° C.
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 特許番号 | US04999362 |
| 出典データセット | uspto-grants-1991_03 |
| ORD ID | ord-8228bc68d1484fdaa0c278a4d67104d6 |
| 出典メモ | uspto-grants-1991_03 |