Cesium carbonate → BI-135585

HRID 1187872Notes

Reaction equation

HRID 1187872 reaction equation
[OH:1][C:2]([CH3:35])([CH3:34])[CH2:3][C@@:4]1([C:28]2[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=2)[O:9][C:8](=[O:10])[N:7]([C@H:11]([C:13]2[CH:18]=[CH:17][C:16](B3OC(C)(C)C(C)(C)O3)=[CH:15][CH:14]=2)[CH3:12])[CH2:6][CH2:5]1.Br[C:37]1[CH:42]=[CH:41][N:40]([CH3:43])[C:39](=[O:44])[CH:38]=1.C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[OH:1][C:2]([CH3:34])([CH3:35])[CH2:3][C@@:4]1([C:28]2[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=2)[O:9][C:8](=[O:10])[N:7]([C@H:11]([C:13]2[CH:14]=[CH:15][C:16]([C:37]3[CH:42]=[CH:41][N:40]([CH3:43])[C:39](=[O:44])[CH:38]=3)=[CH:17][CH:18]=2)[CH3:12])[CH2:6][CH2:5]1

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 221323964-Bromo-1-methylpyridin-2(1H)-oneHCID 59532385(S)-6-(2-hydroxy-2-methylpropyl)-6-phenyl-3-((S)-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethyl)-1,3-oxazinan-2-one

Product 1

HCID 44476893BI-135585Yield 43%

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 312751,4-DioxaneSolvent

Procedure

A mixture of (S)-6-(2-hydroxy-2-methylpropyl)-6-phenyl-3-((S)-1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethyl)-1,3-oxazinan-2-one (200 mg, 0.42 mmol), 4-bromo-1-methylpyridin-2(1H)-one (118 mg, 0.63 mmol), Pd(Ph3P)2Cl2 (20 mg), and 2 M aq Cs2CO3 solution (5 mL, 10 mmol) in 1,4-dioxane (20 mL) was stirred and heated to reflux for 2 h. When the reaction was finished, the mixture was washed with water and extracted with EtOAc. The organic phase was washed with brine, dried over Na2SO4, filtered, and concentrated to give the crude product, which was purified by preparative TLC to give (S)-6-(2-hydroxy-2-methylpropyl)-3-((S)-1-(4-(1-methyl-2-oxo-1,2-dihydropyridin-4-yl)phenyl)ethyl)-6-phenyl-1,3-oxazinan-2-one (83 mg, 43%). LC-MS Method 2 tR=1.16 min, m/z=921.5; 1H NMR (CDCl3) 1.11 (s, 3H), 1.18 (s, 3H), 1.22 (t, 1H), 1.52 (m, 3H), 2.21 (s, 2H), 2.22-2.34 (m, 2H), 2.34-2.46 (m, 1H), 2.85 (m, 1H), 3.57 (s, 3H), 5.59 (m, 1H), 6.33 (d, 1H), 6.68 (s, 1H), 7.01 (d, 2H), 7.29-7.41 (m, 8H); 1H NMR (CD3OD) 0.98 (s, 3H), 1.29 (s, 3H), 1.58 (d, 3H), 2.17 (s, 2H), 2.22 (m, 1H), 2.50 (m, 2H), 3.08 (m, 1H), 3.59 (s, 3H), 5.59 (m, 1H), 6.61 (d, 1H), 6.66 (s, 1H), 7.08 (m, 2H), 7.30-7.40 (5H), 7.42 (d, 2H), 7.70 (d, 1H).

Workup

  1. temperatureheated
  2. temperatureto reflux for 2 h
  3. washthe mixture was washed with water
  4. extractionextracted with EtOAc
  5. washThe organic phase was washed with brine
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customto give the crude product, which
  10. customwas purified by preparative TLC

Sources & evidence

ORD record
ord-60e85a240b9f4e93a2b38db168dcb071
Source dataset
uspto-grants-2014_03
Patent number
US08673899B2

Reaction notes

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