Potassium Carbonate → HCID 89761699, compound

HRID 528532Notes

Reaction equation

HRID 528532 reaction equation
Br[C:2]1[CH:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:5]=[CH:4][C:3]=1[N:12]1[CH2:17][CH2:16][O:15][C:14]2[CH:18]=[C:19]([S:22]([NH:25][C:26]3[S:30][N:29]=[CH:28][N:27]=3)(=[O:24])=[O:23])[CH:20]=[CH:21][C:13]1=2.B1([C:40]2[CH2:45][CH2:44][N:43]([C:46]([O:48][C:49]([CH3:52])([CH3:51])[CH3:50])=[O:47])[CH2:42][CH:41]=2)OC(C)(C)C(C)(C)O1.C([O-])([O-])=O.[K+].[K+]>O1CCOCC1.O.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>[S:30]1[C:26]([NH:25][S:22]([C:19]2[CH:20]=[CH:21][C:13]3[N:12]([C:3]4[CH:4]=[CH:5][C:6]([C:8]([F:11])([F:10])[F:9])=[CH:7][C:2]=4[C:40]4[CH2:45][CH2:44][N:43]([C:46]([O:48][C:49]([CH3:52])([CH3:51])[CH3:50])=[O:47])[CH2:42][CH:41]=4)[CH2:17][CH2:16][O:15][C:14]=3[CH:18]=2)(=[O:24])=[O:23])=[N:27][CH:28]=[N:29]1

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 71711761HCID 71711761, compound

Product 1

HCID 89761699HCID 89761699, compoundYield 29.2%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

A microwave vial was charged with INTERMEDIATE D (0.100 g, 0.192 mmol), (N-tert-butoxycarbonyl)-1,2,3,6-tetrahydropyridine-4-boronic acid pinacol ester (Maybridge Chemicals, Cornwall, UK, 0.059 mL, 0.192 mmol), tetrakis(triphenylphosphine)palladium(0) (0.022 g, 0.019 mmol), and K2CO3 (0.133 g, 0.959 mmol). The solids were diluted with dioxane (1.279 mL) and water (0.639 mL), and the reaction was heated under microwave irradiation at 100° C. for 10 minutes (starting material remained, but moved forward). The reaction mixture was diluted with water, and washed with DCM. Equal partitioning between both layers was observed (and an emulsion formed), so the organic and aqueous were combined and concentrated until just the water remained. The aqueous was washed with DCM (×3) and the organics were then combined and dried using a phase separator. After concentration, the material was purified by reverse-phase preparative HPLC (Column: Phenomenex 150×30 mm, 5 micron, C18 column; 0.1% TFA in CH3CN/H2O, gradient 25% to 90% over 20 min) to provide tert-butyl 4-(2-(7-(N-(1,2,4-thiadiazol-5-yl)sulfamoyl)-2H-benzo[b][1,4]oxazin-4(3 H)-yl)-5-(trifluoromethyl)phenyl)-5,6-dihydropyridine-1(2 H)-carboxylate (0.035 g, 0.056 mmol) as a light-yellow solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.37 (s, 9 H) 2.16-2.37 (m, 2 H) 3.51-3.72 (m, 4 H) 3.81-3.90 (m, 2 H) 4.22-4.34 (m, 2 H) 5.84 (br. s., 1 H) 6.38-6.46 (m, 1 H) 7.10-7.17 (m, 2 H) 7.56 (d, J=8.31 Hz, 1 H) 7.65 (d, J=2.05 Hz, 1 H) 7.72 (dd, J=8.41, 2.15 Hz, 1 H) 8.42 (s, 1 H). m/z (ESI) 524.0 (Boc group falls off in LCMS).

Workup

  1. washwashed with DCM
  2. customEqual partitioning between both layers
  3. customformed), so the organic and
  4. concentrationconcentrated until just the water
  5. washThe aqueous was washed with DCM (×3)
  6. customdried
  7. concentrationAfter concentration
  8. customthe material was purified by reverse-phase preparative HPLC (Column: Phenomenex 150×30 mm, 5 micron, C18 column; 0.1% TFA in CH3CN/H2O, gradient 25% to 90% over 20 min)

Sources & evidence

ORD record
ord-2f4f40bc6c18419297ae0559f73416de
Source dataset
uspto-grants-2016_05
Patent number
US09346798B2

Reaction notes

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