2-Methyl-2-nitro-1,3-propanediol → HCID 21075963, compound

HRID 414933

Reaction equation

HRID 414933 reaction equation
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

Participants

6

Reactant 3

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

Product 1

HCID 21075963HCID 21075963, compound

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8028TetrahydrofuranSolvent

Procedure

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)−.

Workup

  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)

Sources & evidence

ORD record
ord-a46a86893bbe455788439d9b03e756a3
Source dataset
uspto-grants-2012_01
Patent number
US08088762B2

Linked notes

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