Acetic Anhydride → 4-Acetoxy-3-pyridine-4-yl-4-m-tolyl-cyclopent-2-en-1-one

HRID 566726ノート

反応式

HRID 566726 の反応式
O[C:2]1([C:15]2[CH:20]=[CH:19][N:18]=[CH:17][CH:16]=2)[CH2:6][C:5](=[O:7])[CH:4]=[C:3]1[C:8]1[CH:9]=[C:10]([CH3:14])[CH:11]=[CH:12][CH:13]=1.OC1(C2C=C(C)C=CC=2)CC(=O)C=C1C1C=CN=CC=1.CN(C1C=CC=CN=1)C.[C:50]([O:53]C(=O)C)(=[O:52])[CH3:51]>C(Cl)Cl>[C:50]([O:53][C:3]1([C:8]2[CH:9]=[C:10]([CH3:14])[CH:11]=[CH:12][CH:13]=2)[CH2:4][C:5](=[O:7])[CH:6]=[C:2]1[C:15]1[CH:20]=[CH:19][N:18]=[CH:17][CH:16]=1)(=[O:52])[CH3:51]

参加物

6

反応物 4

HCID 7918Acetic AnhydrideHCID 218852-DimethylaminopyridineHCID 212664474-Hydroxy-3-pyridine-4-yl-4-m-tolyl-cyclopent-2-en-1-oneHCID 212665484-Hydroxy-4-pyridine-4-yl-3-m-tolyl-cyclopent-2-en-1-one

生成物 1

HCID 212665564-Acetoxy-3-pyridine-4-yl-4-m-tolyl-cyclopent-2-en-1-one

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

To a solution of 4-hydroxy-4-pyridine-4-yl-3-m-tolyl-cyclopent-2-en-1-one, and it's regioisomer 4-hydroxy-3-pyridine-4-y1-4-m-toly1-cyclopent-2-en-1-one prepared as described in Example 8, Step E (265 mg, 1.0 mmole) in methylene chloride (5 mL) was added dimethylamino pyridine (183 mg, 1.5 mmole) and acetic anhydride (0.12 mL, 1.2 mmole) at r.t. The reaction mixture was stirred at that temperature for 1 hr before quenching the reaction with 1 mL of methanol. Concentration and purification (silica, hexane/ethyl acetate) gave the title compound as the slower eluting isomer. MS (m/z): Calcd. C19H17NO3(M+): 307, found (M+H) +: 308.1.

後処理

  1. custombefore quenching
  2. customthe reaction with 1 mL of methanol
  3. concentrationConcentration and purification (silica, hexane/ethyl acetate)

出典と根拠

ORDレコード
ord-8ad9a94d686d46bdb219eae6e7d60c80
出典データセット
uspto-grants-2001_01
特許番号
US06174901B1

反応ノート

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