Triethylamine → HCID 58109414, compound

HRID 2037442Notes

Reaction equation

HRID 2037442 reaction equation
[CH2:1]([C@@:4]1([C:20]2[CH:25]=[CH:24][C:23]([F:26])=[CH:22][CH:21]=2)[O:9][C:8](=[O:10])[N:7]([C@H:11]([C:13]2[CH:18]=[CH:17][C:16](Br)=[CH:15][CH:14]=2)[CH3:12])[CH2:6][CH2:5]1)[CH:2]=[CH2:3].C(N(CC)CC)C.C1(P(C2C=CC=CC=2)CCCP(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>CS(C)=O.CO.CC([O-])=O.CC([O-])=O.[Pd+2]>[CH2:1]([C@@:4]1([C:20]2[CH:25]=[CH:24][C:23]([F:26])=[CH:22][CH:21]=2)[O:9][C:8](=[O:10])[N:7]([C@H:11]([C:13]2[CH:18]=[CH:17][C:16]([C:8]([O:9][CH3:4])=[O:10])=[CH:15][CH:14]=2)[CH3:12])[CH2:6][CH2:5]1)[CH:2]=[CH2:3]

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 812191,3-Bis(diphenylphosphino)propaneHCID 53473487(R)-6-allyl-3-((S)-1-(4-bromophenyl)ethyl)-6-(4-fluorophenyl)-1,3-oxazinan-2-one

Product 1

HCID 58109414HCID 58109414, compoundYield 164.7%

Reagents, catalysts & solvents 3

HCID 167845palladium(II) acetateCatalystHCID 679Dimethyl SulfoxideSolventHCID 887MethanolSolvent

Procedure

To a 16 mm culture tube with a Teflon-coated stirring bar, a solution of (R)-6-allyl-3-((S)-1-(4-bromophenyl)ethyl)-6-(4-fluorophenyl)-1,3-oxazinan-2-one (87 mg, 0.209 mmol) in dry DMSO (4 mL) and dry methanol (1.5 mL), triethylamine (60 μL, 2 equiv), Pd(OAc)2 (10 mg, 0.2 equiv) and 1,3-bis(diphenylphosphino)propane (35 mg, 0.4 equiv) were added. The tube was sealed with a septum and Parafilm tape. The reaction mixture was purged with CO gas through a long needle for 1 min. A balloon filled with CO gas was attached to maintain a CO atmosphere. The reaction mixture was submerged in an oil bath preheated to 85° C. and stirred vigorously. After 12 h, LC-MS showed the reaction was complete. The mixture was filtered through a thin pad of Celite. The Celite was washed with EtOAc (35 mL). The filtrate was washed with 3% aq HCl (10 mL), water (2×8 mL) and brine (2×7 mL), and dried over Na2SO4. After filtration and concentration, the residue was purified by chromatography on a 12-g silica gel cartridge eluted with a 10-60% EtOAc in hexanes gradient to afford methyl 4-((S)-1-((R)-6-allyl-6-(4-fluorophenyl)-2-oxo-1,3-oxazinan-3-yl)ethyl)benzoate (68.4 mg, 83%). LC-MS Method 1, tR=1.79 min, m/z=398. 1H NMR (CDCl3) 7.79 (d, 2H), 7.26 (m, 2H), 7.04 (t, 2H), 6.94 (d, 2H), 5.69 (m, m, 2H), 5.07 (dd, 2H), 3.89 (s, 3H), 2.94 (m, 1H), 2.58 (m, 2H), 1.54 (d, 3H).

Workup

  1. customThe tube was sealed with a septum and Parafilm tape
  2. customThe reaction mixture was purged with CO gas through a long needle for 1 min
  3. additionA balloon filled with CO gas
  4. temperatureto maintain a CO atmosphere
  5. customThe reaction mixture was submerged in an oil bath
  6. custompreheated to 85° C.
  7. filtrationThe mixture was filtered through a thin pad of Celite
  8. washThe Celite was washed with EtOAc (35 mL)
  9. washThe filtrate was washed with 3% aq HCl (10 mL), water (2×8 mL) and brine (2×7 mL)
  10. dry with materialdried over Na2SO4
  11. filtrationAfter filtration and concentration
  12. customthe residue was purified by chromatography on a 12-g silica gel cartridge
  13. washeluted with a 10-60% EtOAc in hexanes gradient

Sources & evidence

ORD record
ord-6719f8550aed4ee08af1a16af0c3a258
Source dataset
uspto-grants-2013_11
Patent number
US08575156B2

Reaction notes

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