Potassium Fluoride → 5-(2-Methyl-pyridin-4-yl)-1,3-dihydro-isoindole-2-carboxylic acid tert-butyl ester

HRID 1930836Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[CH2:16][C:15]2[C:10](=[CH:11][CH:12]=[C:13](B3OC(C)(C)C(C)(C)O3)[CH:14]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[F-].[K+].Cl[C:29]1[CH:34]=[CH:33][N:32]=[C:31]([CH3:35])[CH:30]=1>O1CCOCC1>[C:1]([O:5][C:6]([N:8]1[CH2:16][C:15]2[C:10](=[CH:11][CH:12]=[C:13]([C:29]3[CH:34]=[CH:33][N:32]=[C:31]([CH3:35])[CH:30]=3)[CH:14]=2)[CH2:9]1)=[O:7])([CH3:2])([CH3:3])[CH3:4]

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture containing 1.4 mmol 5-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-1,3-dihydro-isoindole-2-carboxylic acid tert-butyl ester, 4.8 mmol potassium fluoride, 1.4 mmol 4-chloro-2-picoline (commercial) and 0.03 mmol bis(tri-tert.-butylphosphine)palladium in 5 ml degazed dioxane was stirred at 100° C. for 1.5 hours. The solvent was removed in vacuo. The residue was taken in ethyl acetate. The mixture was washed twice with water. The aqueous layer was extracted once with ethyl acetate. The combined organic layers were dried over Na2SO4, filtered and the solvent was removed in vacuo. The crude oil was purified on a 20 g Flashpack cartridge (Eluent: Heptane/AcOEt) to afford the title compound as a yellow oil (69% yield). MS (m/e): 311.2 ([M+H]+, 100%)

Workup

customThe solvent was removed in vacuo
washThe mixture was washed twice with water
extractionThe aqueous layer was extracted once with ethyl acetate
dry with materialThe combined organic layers were dried over Na2SO4
filtrationfiltered
customthe solvent was removed in vacuo
customThe crude oil was purified on a 20 g Flashpack cartridge (Eluent: Heptane/AcOEt)

Sources & evidence

ORD record: ord-7aa24fe4b5c34424b01488537a0cae15
Source dataset: uspto-grants-2012_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08188139B2

Reaction notes

Loading…