Formic Acid → 4-[4-(tert-Butoxycarbonyl)phenyl]-2-[4-(methoxycarbonyl)benzyl]butanoic acid

HRID 1913774Notes

Reaction equation

C(N(CC)CC)C.C(O)=O.[C:11]([O:15][C:16]([C:18]1[CH:23]=[CH:22][C:21]([CH2:24][CH2:25][C:26]([CH2:39][C:40]2[CH:45]=[CH:44][C:43]([C:46]([O:48][CH3:49])=[O:47])=[CH:42][CH:41]=2)(C(OCC=C)=O)[C:27]([O:29]CC=C)=[O:28])=[CH:20][CH:19]=1)=[O:17])([CH3:14])([CH3:13])[CH3:12].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>O1CCOCC1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[C:11]([O:15][C:16]([C:18]1[CH:19]=[CH:20][C:21]([CH2:24][CH2:25][CH:26]([CH2:39][C:40]2[CH:45]=[CH:44][C:43]([C:46]([O:48][CH3:49])=[O:47])=[CH:42][CH:41]=2)[C:27]([OH:29])=[O:28])=[CH:22][CH:23]=1)=[O:17])([CH3:13])([CH3:14])[CH3:12]

Participants

Conditions

Temperature: 100 °C

Procedure

A solution of 0.79 ml (5.66 mmol) of triethylamine and 0.16 ml (4.29 mmol) of formic acid in 10 ml of dioxane is added to a solution of 920 mg (1.71 mmol) of diallyl {2-[4-(tert-butoxycarbonyl)phenyl]ethyl}[4-(methoxycarbonyl)benzyl]malonate, 31.5 mg (0.12 mmol) of triphenylphosphine and 7.7 mg (0.03 mmol) of palladium acetate in 10 ml of dioxane at room temperature. The reaction mixture is then stirred at 100° C. for 12 hours. After conversion is complete, the reaction solution is cooled and the solvent is removed in vacuo. The resulting residue is purified by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 4:1→1:1). 497 mg (1.2 mmol, 61% yield) of a colourless solid are obtained.

Workup

temperaturethe reaction solution is cooled
customthe solvent is removed in vacuo
customThe resulting residue is purified by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 4:1→1:1)

Sources & evidence

ORD record: ord-a52f1a2c8080404ba05a72dfe7f94282
Source dataset: uspto-grants-2013_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08609727B2

Reaction notes

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