Water → 2-(6-(1H-pyrazol-5-yl)-2,3-dihydrobenzo[b][1,4]oxazin-4-yl)-6,6-dimethyl-6,7-dihydrothiazolo[5,4-c]pyridin-4(5H)-one

HRID 885964Notes

Reaction equation

Br[C:2]1[CH:3]=[CH:4][C:5]2[O:10][CH2:9][CH2:8][N:7]([C:11]3[S:12][C:13]4[CH2:14]C(C)(C)N[C:17](=O)[C:18]=4[N:19]=3)[C:6]=2[CH:23]=1.[NH:24]1[CH:28]=[CH:27][C:26](B(O)O)=[N:25]1.C([O-])([O-])=O.[Na+].[Na+].[OH2:38]>COCCOC.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[CH3:5][C:6]1([CH3:23])[NH:7][C:14](=[O:38])[C:13]2[S:12][C:11]([N:7]3[C:6]4[CH:23]=[C:2]([C:26]5[NH:25][N:24]=[CH:28][CH:27]=5)[CH:3]=[CH:4][C:5]=4[O:10][CH2:9][CH2:8]3)=[N:19][C:18]=2[CH2:17]1

Participants

Conditions

Temperature: 140 °C

Procedure

A stirred suspension of Example 39 (0.050 g, 0.14 mmol), 3-pyrazoleboronic acid (0.055 g, 0.42 mmol), Na2CO3 (0.045 g, 0.42 mmol) and tetrakis(triphenylphosphine)-palladium(0) (0.005 g) in a mixture of DME (4 mL) and water (1 mL) was heated to 140° C. in a sealed tube, under microwave irradiation, for 30 minutes. After cooling to r.t., the reaction mixture was concentrated in vacuo. Purification by preparative HPLC (Method 7) gave the title compound (0.0318 g, 60%) as an off-white solid. δH (CDCl3/CD3OD) 8.20 (1H, s), 7.60 (1H, s), 7.40 (1H, dd, J 8.7 and J 2.1 Hz), 7.00 (1H, d, J 8.5 Hz), 6.50 (1H, s), 4.40 (2H, m), 4.10 (2H, m), 2.90 (2H, s), 1.40 (6H, s). LCMS (ES+) 381.0 (M)+, RT 2.85 minutes (Method 2).

Workup

temperatureAfter cooling to r.t.
concentrationthe reaction mixture was concentrated in vacuo
customPurification by preparative HPLC (Method 7)

Sources & evidence

ORD record: ord-132896515c86457a8f0bc7a91b4e90d3
Source dataset: uspto-grants-2012_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08242116B2

Reaction notes

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