(S)-3-((S)-1-(4-bromophenyl)ethyl)-6-(2-hydroxy-2-methylpropyl)-6-phenyl-1,3-oxazinan-2-one → (S)-6-(2-hydroxy-2-methylpropyl)-3-((S)-1-(4-(2-methoxypyridin-4-yl)phenyl)ethyl)-6-phenyl-1,3-oxazinan-2-one

HRID 1191806Notes

Reaction equation

HRID 1191806 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([C@@H:8]([N:10]2[CH2:15][CH2:14][C@:13]([CH2:22][C:23]([OH:26])([CH3:25])[CH3:24])([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)[O:12][C:11]2=[O:27])[CH3:9])=[CH:4][CH:3]=1.[CH3:28][O:29][C:30]1[CH:35]=[C:34](B2OC(C)(C)C(C)(C)O2)[CH:33]=[CH:32][N:31]=1>C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[OH:26][C:23]([CH3:25])([CH3:24])[CH2:22][C@@:13]1([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[O:12][C:11](=[O:27])[N:10]([C@H:8]([C:5]2[CH:6]=[CH:7][C:2]([C:34]3[CH:33]=[CH:32][N:31]=[C:30]([O:29][CH3:28])[CH:35]=3)=[CH:3][CH:4]=2)[CH3:9])[CH2:15][CH2:14]1

Participants

4

Reactant 2

HCID 44599033(S)-3-((S)-1-(4-bromophenyl)ethyl)-6-(2-hydroxy-2-methylpropyl)-6-phenyl-1,3-oxazinan-2-oneHCID 447548622-Methoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine

Product 1

HCID 59635722(S)-6-(2-hydroxy-2-methylpropyl)-3-((S)-1-(4-(2-methoxypyridin-4-yl)phenyl)ethyl)-6-phenyl-1,3-oxazinan-2-oneYield 105.7%

Reagents, catalysts & solvents 1

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)Catalyst

Procedure

A mixture of (S)-3-((S)-1-(4-bromophenyl)ethyl)-6-(2-hydroxy-2-methylpropyl)-6-phenyl-1,3-oxazinan-2-one (100 mg, 0.23 mmol), 2-methoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (68 mg, 1.25 equiv), Pd(dppf)Cl2.CH2Cl2 (19 mg, 10% mol), 2M aq Na2CO3 (1 mL), 1,4-dioxane (3 mL) was degassed, refilled with N2 gas for 3 times before being put into microwave oven for 2 h at 130° C. LC-MS found the reaction was completed. The mixture was diluted with EtOAc (50 mL), washed with water (10 mL) and brine (8 mL), and dried over Na2SO4. After filtration and concentration, the residue was purified by chromatography on a 12-g silica gel column, eluted with a 0 to 10% MeOH in CH2Cl2 gradient to afford (S)-6-(2-hydroxy-2-methylpropyl)-3-((S)-1-(4-(2-methoxypyridin-4-yl)phenyl)ethyl)-6-phenyl-1,3-oxazinan-2-one (112 mg, quant yield). LC-MS Method 1 tR=1.66 min, m/z=461(M+1).

Workup

  1. customCH2Cl2 (19 mg, 10% mol), 2M aq Na2CO3 (1 mL), 1,4-dioxane (3 mL) was degassed
  2. additionrefilled with N2 gas for 3 times
  3. additionThe mixture was diluted with EtOAc (50 mL)
  4. washwashed with water (10 mL) and brine (8 mL)
  5. dry with materialdried over Na2SO4
  6. filtrationAfter filtration and concentration
  7. customthe residue was purified by chromatography on a 12-g silica gel column
  8. washeluted with a 0 to 10% MeOH in CH2Cl2 gradient

Sources & evidence

ORD record
ord-562263e0c7034f95868c48f396784a7f
Source dataset
uspto-grants-2014_03
Patent number
US08680093B2

Reaction notes

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