Sodium Bicarbonate → 1-[4'-(4-Formyl-3-methyl-isoxazol-5-yl)-biphenyl-4-yl]-cyclopropanecarboxylic acid ethyl ester

HRID 1624400Notes

Reaction equation

Br[C:2]1[CH:7]=[CH:6][C:5]([C:8]2[O:12][N:11]=[C:10]([CH3:13])[C:9]=2[CH:14]=[O:15])=[CH:4][CH:3]=1.[CH2:16]([O:18][C:19]([C:21]1([C:24]2[CH:29]=[CH:28][C:27](B3OC(C)(C)C(C)(C)O3)=[CH:26][CH:25]=2)[CH2:23][CH2:22]1)=[O:20])[CH3:17].C(=O)(O)[O-].[Na+]>COCCOC.O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH2:16]([O:18][C:19]([C:21]1([C:24]2[CH:29]=[CH:28][C:27]([C:2]3[CH:7]=[CH:6][C:5]([C:8]4[O:12][N:11]=[C:10]([CH3:13])[C:9]=4[CH:14]=[O:15])=[CH:4][CH:3]=3)=[CH:26][CH:25]=2)[CH2:22][CH2:23]1)=[O:20])[CH3:17]

Participants

Conditions

Temperature: 85 °C

Procedure

5-(4-Bromo-phenyl)-3-methyl-isoxazole-4-carbaldehyde (0.5 g, 1.88 mmol) was mixed with 1-[4-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-cyclopropanecarboxylic acid ethyl ester (0.72 g, 2.07 mmol) and sodium bicarbonate (0.553 g, 6.58 mmol) in DME (5 mL) and H2O (2.5 mL). The reaction was purged with N2 (g) then bis(triphenylphosphine)palladium(II) dichloride (0.066 g, 0.094 mmol) was added and the reaction was heated to 85° C. overnight. After cooling to room temperature the reaction was submitted to standard aqueous workup the purified by silica gel chromatograph (0-20% EtOAc in hexanes) to give the title compound.

Workup

customThe reaction was purged with N2 (g)
temperatureAfter cooling to room temperature the reaction
custompurified by silica gel chromatograph (0-20% EtOAc in hexanes)

Sources & evidence

ORD record: ord-349400d3044740d18303791cc67841c1
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08778983B2

Reaction notes

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