Water → 8-(1H-Pyrazol-4-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid

HRID 1849042Notes

Reaction equation

Br[C:2]1[CH:18]=[CH:17][C:5]2[C:6]3[N:7]=[C:8]([C:14]([OH:16])=[O:15])[S:9][C:10]=3[CH2:11][CH2:12][O:13][C:4]=2[CH:3]=1.CC1(C)C(C)(C)OB([C:27]2[CH:28]=[N:29][NH:30][CH:31]=2)O1.C(=O)(O)[O-].[Na+].O.C(#N)C>C(OCC)(=O)C.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>[NH:29]1[CH:28]=[C:27]([C:2]2[CH:18]=[CH:17][C:5]3[C:6]4[N:7]=[C:8]([C:14]([OH:16])=[O:15])[S:9][C:10]=4[CH2:11][CH2:12][O:13][C:4]=3[CH:3]=2)[CH:31]=[N:30]1

Participants

Conditions

Temperature: 150 °C

Procedure

To a degassed solution of 8-bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid (1.40 g, 4.29 mmol), 4,4,5,5-Tetramethyl-2-(1H-pyrazol-4-yl)-1,3,2-dioxaborolane (1.0 g, 5.0 mmol), 2 M Sodium bicarbonate in water (6.0 mL, 10.0 mmol) and acetonitrile (8.0 mL, 200 mmol) in a microwave vial was added Tetrakis(triphenylphosphine)palladium(0) (0.499 g, 0.432 mmol). The vial was heated on the Emrys microwave at 150° C. for 20 minutes. Cooled to room temperature and diluted with ethyl acetate, the precipitate was filtered off, washed with ethyl acetate and water and dried under vacuum to give 8-(1H-Pyrazol-4-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid (1.4 g, 103% yield).

Workup

temperatureCooled to room temperature
filtrationthe precipitate was filtered off
washwashed with ethyl acetate and water
customdried under vacuum

Sources & evidence

ORD record: ord-06317d04182145228f6760dffeeacbc4
Source dataset: uspto-grants-2015_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08952043B2

Reaction notes

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