Pyridine → Ethyl 4,6-dimethyl-2-oxo-1-phenyl-1,2-dihydropyridine-3-carboxylate

HRID 2195536

反応式

HRID 2195536 の反応式
[CH3:1][C:2]1[CH:7]=[C:6]([CH3:8])[NH:5][C:4](=[O:9])[C:3]=1[C:10]([O:12][CH2:13][CH3:14])=[O:11].[C:15]1(B(O)O)[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.N1C=CC=CC=1>O1CCOCC1>[CH3:1][C:2]1[CH:7]=[C:6]([CH3:8])[N:5]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)[C:4](=[O:9])[C:3]=1[C:10]([O:12][CH2:13][CH3:14])=[O:11]

参加物

5

反応物 3

HCID 1049PyridineHCID 66827Phenylboronic AcidHCID 247443Ethyl 4,6-dimethyl-2-oxo-1,2-dihydropyridine-3-carboxylate

生成物 1

HCID 13837925Ethyl 4,6-dimethyl-2-oxo-1-phenyl-1,2-dihydropyridine-3-carboxylate収率 31.2%

試薬・触媒・溶媒 1

HCID 312751,4-Dioxane溶媒

反応条件

温度
80 °C

実験手順

A suspension of ethyl 4,6-dimethyl-2-oxo-1,2-dihydropyridine-3-carboxylate (7.5 g, 0.038 mol), phenylboronic acid (14.1 g, 0.115 mol), cupric acetate (1.38 g, 0.008 mol), pyridine (7.5 mL) in 1,4-dioxane (80 mL) is heated at 80° C. for 96 hours. The solid is filtered off and the filtrate is concentrated. The residue is partitioned with EtOAc (50 mL) and 2N HCl (70 mL), and the precipitate is collected by filtration and washed with EtOAc to give the title product (2.95 g). The EtOAc solution is separated, dried and concentrated. The residue is purified by silica gel column chromatography eluting with PE:acetone (2:1) to give another portion of (0.3 g). (3.25 g, 31.2% yield). MS (m/z): 272.0 (M+H).

後処理

  1. filtrationThe solid is filtered off
  2. concentrationthe filtrate is concentrated
  3. customThe residue is partitioned with EtOAc (50 mL) and 2N HCl (70 mL)
  4. filtrationthe precipitate is collected by filtration
  5. washwashed with EtOAc

出典と根拠

ORDレコード
ord-499c94a7e3e545b7aedb83d98329b027
出典データセット
uspto-grants-2012_12
特許番号
USRE043878E1

関連ノート

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