Water → 9-Biphenyl-4-yl-3,4-dihydropyrido[2,1-c][1,2,4]thiadiazine 2,2-dioxide

HRID 1405686Notes

Reaction equation

C(=O)([O-])[O-].[Na+].[Na+].Br[C:8]1[C:13]2=[N:14][S:15](=[O:19])(=[O:18])[CH2:16][CH2:17][N:12]2[CH:11]=[CH:10][CH:9]=1.[C:20]1([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[CH:25]=[CH:24][C:23](B(O)O)=[CH:22][CH:21]=1.O>COCCOC.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:20]1([C:29]2[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=2)[CH:25]=[CH:24][C:23]([C:8]2[C:13]3=[N:14][S:15](=[O:19])(=[O:18])[CH2:16][CH2:17][N:12]3[CH:11]=[CH:10][CH:9]=2)=[CH:22][CH:21]=1

Participants

Conditions

Temperature: 100 °C

Procedure

Tetrakis(triphenylphosphine)palladium(0) (32.9 mg) was added to a mixture of 2M aqueous sodium carbonate solution (0.428 mL), 9-bromo-3,4-dihydropyrido[2,1-c][1,2,4]thiadiazine 2,2-dioxide (150 mg) and biphenyl-4-ylboronic acid (135 mg) in 1,2-dimethoxyethane (5.701 mL). The reaction mixture was stirred under a nitrogen atmosphere at 100° C. overnight, added to water, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane, then ethyl acetate/methanol) to give the title compound (44.5 mg) as a pale-brown solid.

Workup

extractionthe mixture was extracted with ethyl acetate
washThe organic layer was washed with saturated brine
dry with materialdried over anhydrous magnesium sulfate
concentrationconcentrated under reduced pressure
customThe residue was purified by silica gel column chromatography (ethyl acetate/hexane

Sources & evidence

ORD record: ord-d5c0991ec6b2479ebacda7c4e2d27775
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08916551B2

Reaction notes

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