Trifluoromethanesulfonic acid → 2,4-Difluoro-3-(7-pyridin-4-yl-2,3-dihydro-pyrazolo[5,1-b]thiazol-6-yl)phenylamine

HRID 38108Notes

Reaction equation

C([N:8](CC1C=CC=CC=1)[C:9]1[CH:14]=[CH:13][C:12]([F:15])=[C:11]([C:16]2[C:23]([C:24]3[CH:29]=[CH:28][N:27]=[CH:26][CH:25]=3)=[C:19]3[S:20][CH2:21][CH2:22][N:18]3[N:17]=2)[C:10]=1[F:30])C1C=CC=CC=1.FC(F)(F)S(O)(=O)=O>C1(C)C=CC=CC=1.C(OCC)(=O)C>[F:30][C:10]1[C:11]([C:16]2[C:23]([C:24]3[CH:29]=[CH:28][N:27]=[CH:26][CH:25]=3)=[C:19]3[S:20][CH2:21][CH2:22][N:18]3[N:17]=2)=[C:12]([F:15])[CH:13]=[CH:14][C:9]=1[NH2:8]

Participants

Conditions

Temperature: 120 °C

Procedure

To dibenzyl-[2,4-difluoro-3-(7-pyridin-4-yl-2,3-dihydro-pyrazolo[5,1-b]thiazol-6-yl)-phenyl]-amine (180 mg, 0.34 mmol) in toluene (2 mL) was added trifluoro-methanesulfonic acid (3.5 mL) in a sealable vial under nitrogen atmosphere. The mixture was stirred under microwave irradiation at 120° C. for ten minutes. The crude was diluted with ethyl acetate and washed with NaHCO3 saturated solution twice. The organic layer was dried over anhydrous sodium sulfate, filtered and the solvent was removed under reduced pressure. The product was isolated by column chromatography eluting with ethyl acetate: hexane (1: 1) (115 mg).

Workup

washwashed with NaHCO3 saturated solution twice
dry with materialThe organic layer was dried over anhydrous sodium sulfate
filtrationfiltered
customthe solvent was removed under reduced pressure
customThe product was isolated by column chromatography
washeluting with ethyl acetate: hexane (1: 1) (115 mg)

Sources & evidence

ORD record: ord-b5b48a6b34d74338837d59a9249ec437
Source dataset: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08524707B2

Reaction notes

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