Hydrochloric Acid → 2-Hydroxymethyl-6-methyl-4-(nitrophenyl)-3,5-diethoxycarbonyl-1,4-dihydropyridine

HRID 614607ノート

反応式

HRID 614607 の反応式
[CH3:1][C:2]1[NH:3][C:4]([CH:27]=[O:28])=[C:5]([C:22]([O:24][CH2:25][CH3:26])=[O:23])[CH:6]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=2[N+:19]([O-:21])=[O:20])[C:7]=1[C:8]([O:10][CH2:11][CH3:12])=[O:9].[BH4-].[Na+].Cl>C(O)C>[CH3:1][C:2]1[NH:3][C:4]([CH2:27][OH:28])=[C:5]([C:22]([O:24][CH2:25][CH3:26])=[O:23])[CH:6]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=2[N+:19]([O-:21])=[O:20])[C:7]=1[C:8]([O:10][CH2:11][CH3:12])=[O:9]

参加物

5

反応物 3

HCID 313Hydrochloric AcidHCID 4311764Sodium borohydrideHCID 13388352Diethyl 2-methyl-4-(2-nitrophenyl)-6-formyl-1,4-dihydropyridine-3,5-dicarboxylate

生成物 1

HCID 133883402-Hydroxymethyl-6-methyl-4-(nitrophenyl)-3,5-diethoxycarbonyl-1,4-dihydropyridine収率 88.6%

試薬・触媒・溶媒 1

HCID 702Ethanol溶媒

実験手順

To a solution of diethyl 2-methyl-4-(2-nitrophenyl)-6-formyl-1,4-dihydropyridine-3,5-dicarboxylate (2.0881 g) in ethanol (20 ml) was gradually added sodium borohydride (0.1892 g) under stirring and the resultant mixture was further stirred at room temperature for an hour. The solution was acidified with dilute hydrochloric acid and stirred at room temperature for 30 minutes. After the resultant solution was filtered, the filtrate was concentrated under reduced pressure and extracted with ethyl acetate. The extract was washed with water and dried and then the solvent was removed to give orange oil (1.8596 g) of diethyl 2-methyl-4-(2-nitrophenyl)-6-hydroxymethyl-1,4-dihydropyridine-3,5-dicarboxylate. After the crude, product was dissolved in ethanol, the solution was filtered. The filtrate was concentrated under reduced pressure and the oily residue was allowed to stand for 3 days. Thus obtained crystals were recrystallized from ether to give pure product, m.p. 112° to 113° C.

後処理

  1. stirringstirred at room temperature for 30 minutes
  2. filtrationAfter the resultant solution was filtered
  3. concentrationthe filtrate was concentrated under reduced pressure
  4. extractionextracted with ethyl acetate
  5. washThe extract was washed with water
  6. customdried
  7. customthe solvent was removed

出典と根拠

ORDレコード
ord-a3fb9826540243d7ad3857088d668ec1
出典データセット
uspto-grants-1979_03
特許番号
US04145432

反応ノート

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