Tributylvinyltin → {1-[4-(4-oxo-2-phenyl-8-vinyl-4H-chromen-3-yl)-phenyl]-cyclobutyl}-carbamic acid tert-butyl ester

HRID 1037408Notes

Reaction equation

[C:1]([O:5][C:6](=[O:36])[NH:7][C:8]1([C:12]2[CH:17]=[CH:16][C:15]([C:18]3[C:27](=[O:28])[C:26]4[C:21](=[C:22](Br)[CH:23]=[CH:24][CH:25]=4)[O:20][C:19]=3[C:30]3[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=3)=[CH:14][CH:13]=2)[CH2:11][CH2:10][CH2:9]1)([CH3:4])([CH3:3])[CH3:2].[CH2:37]([Sn](CCCC)(CCCC)C=C)[CH2:38]CC>C1(C)C=CC=CC=1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:1]([O:5][C:6](=[O:36])[NH:7][C:8]1([C:12]2[CH:17]=[CH:16][C:15]([C:18]3[C:27](=[O:28])[C:26]4[C:21](=[C:22]([CH:37]=[CH2:38])[CH:23]=[CH:24][CH:25]=4)[O:20][C:19]=3[C:30]3[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=3)=[CH:14][CH:13]=2)[CH2:11][CH2:10][CH2:9]1)([CH3:4])([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 90 °C

Procedure

A solution of {1-[4-(8-bromo-4-oxo-2-phenyl-4H-chromen-3-yl)-phenyl]-cyclobutyl}-carbamic acid tert-butyl ester (100 mg, 0.183 mmol) in anhydrous toluene (3 mL) was degassed using argon. Tetrakis(triphenylphosphine)palladium(0) (21 mg, 0.018 mmol) and tributyl(vinyl)tin (0.080 mL, 0.274 mmol) were added. The reaction vial was degassed using argon and the reaction mixture was stirred at 90° C. for 2 h. The resultant mixture was allowed to cool to RT and subjected to flash chromatography (SiO2, gradient 0 to 40% EtOAc in cyclohexane) to give the title compound as a gummy solid (81 mg, 90%). LCMS (Method G): RT=4.73 min, [M+H]+=494.

Workup

customThe reaction vial was degassed
temperatureto cool to RT

Sources & evidence

ORD record: ord-66fa6122c91145c6a137a424547cdf0c
Source dataset: uspto-grants-2013_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08546376B2

Reaction notes

Loading…