Ethyl Acetate → 3-{[5-(azetidin-1-ylcarbonyl)pyrazin-2-yl]oxy}-5-[((1S)-2-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-1-methylethyl)oxy]-N-(5-methylpyrazin-2-yl)benzamide

HRID 1990276Notes

Reaction equation

HRID 1990276 reaction equation
[CH3:1][C:2]([Si:5]([CH3:29])([CH3:28])[O:6][CH2:7][C@@H:8]([O:10][C:11]1[CH:12]=[C:13]([CH:24]=[C:25]([OH:27])[CH:26]=1)[C:14]([NH:16][C:17]1[CH:22]=[N:21][C:20]([CH3:23])=[CH:19][N:18]=1)=[O:15])[CH3:9])([CH3:4])[CH3:3].[N:30]1([C:34]([C:36]2[CH:41]=[N:40][C:39](Cl)=[CH:38][N:37]=2)=[O:35])[CH2:33][CH2:32][CH2:31]1.C(=O)([O-])[O-].[K+].[K+].C(OCC)(=O)C>C(#N)C>[N:30]1([C:34]([C:36]2[N:37]=[CH:38][C:39]([O:27][C:25]3[CH:24]=[C:13]([CH:12]=[C:11]([O:10][C@@H:8]([CH3:9])[CH2:7][O:6][Si:5]([C:2]([CH3:3])([CH3:4])[CH3:1])([CH3:28])[CH3:29])[CH:26]=3)[C:14]([NH:16][C:17]3[CH:22]=[N:21][C:20]([CH3:23])=[CH:19][N:18]=3)=[O:15])=[N:40][CH:41]=2)=[O:35])[CH2:33][CH2:32][CH2:31]1

Participants

6

Reactant 4

HCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 46870328(Azetidin-1-yl)(5-chloropyrazin-2-yl)methanoneHCID 53629692HCID 53629692, compound

Product 1

HCID 536296913-{[5-(azetidin-1-ylcarbonyl)pyrazin-2-yl]oxy}-5-[((1S)-2-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-1-methylethyl)oxy]-N-(5-methylpyrazin-2-yl)benzamideYield 53.6%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
140 °C

Procedure

A mixture of 3-[((1S)-2-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-1-methylethyl)oxy]-5-hydroxy-N-(5-methylpyrazin-2-yl)benzamide (0.12 g, 0.29 mmol), 2-(azetidin-1-ylcarbonyl)-5-chloropyrazine (57 mg, 0.29 mmol) and potassium carbonate (80 mg, 0.57 mmol) in acetonitrile (5 mL) was stirred in a microwave reactor at 140° C. for 1 hour. The mixture was reduced in vacuo and ethyl acetate (50 mL) added. The mixture was washed with water (50 mL), brine (50 mL), dried (MgSO4), filtered and reduced in vacuo to give a brown oil which was chromatographed on silica, eluting with 50 to 100% ethyl acetate in isohexane, to give the desired compound as a colourless oil (90 mg). 1H NMR δ (CDCl3): −0.03 (s, 3H), 0.00 (s, 3H), 0.81 (s, 9H), 1.26 (d, 3H), 2.32 (quin, 2H), 2.49 (s, 3H), 3.61-3.76 (m, 2H), 4.20 (t, 2H), 4.46 (sextet, 1H), 4.62 (t, 2H), 6.91 (t, 1H), 7.21 (t, 1H), 7.32 (t, 1H), 8.07 (s, 1H), 8.28 (d, 1H), 8.30 (s, 1H), 8.79 (d, 1H), 9.48 (d, 1H). m/z 579 (M+H)+

Workup

  1. additionadded
  2. washThe mixture was washed with water (50 mL), brine (50 mL)
  3. dry with materialdried (MgSO4)
  4. filtrationfiltered
  5. customto give a brown oil which
  6. customwas chromatographed on silica
  7. washeluting with 50 to 100% ethyl acetate in isohexane

Sources & evidence

ORD record
ord-b35bf34bb1ae46b59aa7f6aefc205be5
Source dataset
uspto-grants-2010_01
Patent number
US07642259B2

Reaction notes

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