2-Methyl-2-nitro-1,3-propanediol → HCID 21075963、化合物

HRID 414933

反応式

HRID 414933 の反応式
C1(N=C=NC2CCCCC2)CCCCC1.[CH3:16][O:17][C:18]1[CH:19]=[C:20]2[C:25](=[CH:26][CH:27]=1)[CH:24]=[C:23]([C@H:28]([CH3:32])[C:29]([OH:31])=[O:30])[CH:22]=[CH:21]2.[N+:33]([C:36]([CH3:41])([CH2:39]O)[CH2:37][OH:38])([O-:35])=[O:34]>C(Cl)Cl.C1COCC1>[CH3:16][O:17][C:18]1[CH:19]=[C:20]2[C:25](=[CH:26][CH:27]=1)[CH:24]=[C:23]([C@H:28]([CH3:32])[C:29]([O:31][CH2:39][C:36]([CH3:41])([N+:33]([O-:35])=[O:34])[CH2:37][OH:38])=[O:30])[CH:22]=[CH:21]2

参加物

6

反応物 3

HCID 64802-Methyl-2-nitro-1,3-propanediolHCID 10868DicyclohexylcarbodiimideHCID 156391Naproxen

生成物 1

HCID 21075963HCID 21075963、化合物

試薬・触媒・溶媒 2

HCID 6344Dichloromethane溶媒HCID 8028Tetrahydrofuran溶媒

実験手順

A solution of 1,3-dicyclohexylcarbodiimide (4.23 g, 20.5 mmol), (2S)-2-(6-methoxy(2-naphthyl))propanoic acid (naproxen, 4.34 g, 18.9 mmol), and 2-nitro-2-methyl-1,3-propanediol (2.56 g, 19.0 mmol) in CH2Cl2 (50 mL) and THF (50 mL) was stirred at ambient temperature overnight. The solvent was evaporated and EtOAc (100 mL) was added to the resulting crude material, cooled in a dry-ice bath and the byproduct, dicyclohexyl urea was removed by filtration. The product was separated by silica gel column chromatography eluting with ethyl acetate/hexane (1:3, Rf=0.1) to give the title compound (a mixture of diasteromers) as an oil (2.77 g, 42% yield). 1H NMR (300 MHz, CDCl3) δ 7.69-7.60 (m, 3H), 7.34-7.3 (m, 1H), 7.14-7.08 (m, 2H), 4.44 (d, J=4.2 Hz, 2H), 3.86 (s, 3H), 3.85 (q, J=7.2 Hz, 1H), 1.55 (d, J=7.2 Hz, 3H), 1.36 & 1.40 (s, 3H). 13C NMR (75 MHz, CDCl3) δ 174.14, 174.02 157.57, 134.53, 134.51, 133.64, 129.13, 128.7, 127.17, 125.87, 125.84, 119.0, 105.47, 89.53, 89.42, 64.67, 64.52, 64.19, 55.12, 45.04, 18.25, 18.03, 17.82, 17.79. Mass spectrum (API-TIS) m/z 348 (MH)−.

後処理

  1. customThe solvent was evaporated
  2. additionEtOAc (100 mL) was added to the resulting crude material
  3. temperaturecooled in a dry-ice bath
  4. customthe byproduct, dicyclohexyl urea was removed by filtration
  5. customThe product was separated by silica gel column chromatography
  6. washeluting with ethyl acetate/hexane (1:3, Rf=0.1)

出典と根拠

ORDレコード
ord-a46a86893bbe455788439d9b03e756a3
出典データセット
uspto-grants-2012_01
特許番号
US08088762B2

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