Sodium hydride → Benzyl 3-(2-cyano-3-nitrophenoxy)-2,2-dimethylpropanoate

HRID 1467061Notes

Reaction equation

[OH:1][CH2:2][C:3]([CH3:15])([CH3:14])[C:4]([O:6][CH2:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)=[O:5].[H-].[Na+].[N+:18]([C:21]1[CH:28]=[CH:27][CH:26]=[C:25]([N+]([O-])=O)[C:22]=1[C:23]#[N:24])([O-:20])=[O:19]>C1COCC1>[C:23]([C:22]1[C:21]([N+:18]([O-:20])=[O:19])=[CH:28][CH:27]=[CH:26][C:25]=1[O:1][CH2:2][C:3]([CH3:15])([CH3:14])[C:4]([O:6][CH2:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)=[O:5])#[N:24]

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of benzyl 3-hydroxy-2,2-dimethylpropanoate (Yang, D. et al. J. Am. Chem. Soc. 2002, 124, 9966. 6.68 g, 32.1 mmol) in dry THF (200 mL) was carefully added NaH (60% in mineral oil, 3.5 g, 87.5 mmol) in small portions at 0° C. under nitrogen. The reaction mixture was stirred at 0° C. under nitrogen for 2 hrs. To this solution was added 2,6-dinitrobenzonitrile (6.19 g, 32.1 mmol), and the reaction solution was stirred at 0° C.—RT under nitrogen overnight. The reaction mixture was quenched with brine, and extracted with EtOAc (3×). The combined organic layers were washed with brine, dried over Na2SO4. After evaporation of the solvent, the residue was purified by chromatography on silica gel eluting (Elunet: 20% EtOAc in hexanes) to give the title compound as a brown solid (10.0 g, 87%). MS 355 (MH+).

Workup

customat 0° C.
stirringthe reaction solution was stirred at 0° C.—RT under nitrogen overnight
customThe reaction mixture was quenched with brine
extractionextracted with EtOAc (3×)
washThe combined organic layers were washed with brine
dry with materialdried over Na2SO4
customAfter evaporation of the solvent
customthe residue was purified by chromatography on silica gel eluting (Elunet: 20% EtOAc in hexanes)

Sources & evidence

ORD record: ord-a2d025583c694e6e8a9de952061da223
Source dataset: uspto-grants-2015_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09000054B2

Reaction notes

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