Formic Acid → 4-(4-Cyanophenyl)-2-(3,5-difluoro-4-triisopropylsilanyloxybenzyl)butanoic acid

HRID 1921892Notes

Reaction equation

[C:1]([C:3]1[CH:8]=[CH:7][C:6]([CH2:9][CH2:10][C:11]([CH2:24][C:25]2[CH:30]=[C:29]([F:31])[C:28]([O:32][Si:33]([CH:40]([CH3:42])[CH3:41])([CH:37]([CH3:39])[CH3:38])[CH:34]([CH3:36])[CH3:35])=[C:27]([F:43])[CH:26]=2)(C(OCC=C)=O)[C:12]([O:14]CC=C)=[O:13])=[CH:5][CH:4]=1)#[N:2].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(N(CC)CC)C.C(O)=O>O1CCOCC1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[C:1]([C:3]1[CH:8]=[CH:7][C:6]([CH2:9][CH2:10][CH:11]([CH2:24][C:25]2[CH:26]=[C:27]([F:43])[C:28]([O:32][Si:33]([CH:34]([CH3:36])[CH3:35])([CH:37]([CH3:39])[CH3:38])[CH:40]([CH3:41])[CH3:42])=[C:29]([F:31])[CH:30]=2)[C:12]([OH:14])=[O:13])=[CH:5][CH:4]=1)#[N:2]

Participants

Conditions

Temperature: 100 °C

Procedure

4720 mg (7.72 mmol) of diallyl 2-[2-(4-cyanophenyl)ethyl]-2-(3,5-difluoro-4-triisopropylsilanyloxybenzyl)malonate, 34.6 mg (0.15 mmol) of palladium(II) acetate and 141.6 mg (0.54 mmol) of triphenylphosphine are stirred in 180 ml of dioxane under argon. Then a solution of 2576 mg (25.60 mmol) of triethylamine and 887.7 mg (19.29 mmol) of formic acid in 90 ml of dioxane is added dropwise, and the mixture is heated at 100° C. for 2 h. The cooled mixture is concentrated and the crude product is chromatographed on silica gel (mobile phase: cyclohexane/ethyl acetate 9:1→2:1→1:1). 3682 mg (97.9% of theory) of the title compound are obtained

Workup

concentrationThe cooled mixture is concentrated
customthe crude product is chromatographed on silica gel (mobile phase: cyclohexane/ethyl acetate 9:1→2:1→1:1)

Sources & evidence

ORD record: ord-0ffa7ddc00b54485ae19303172bb6b80
Source dataset: uspto-grants-2012_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08173704B2

Reaction notes

Loading…