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

HRID 1640790Notes

Reaction equation

HRID 1640790 reaction equation
BrC1C=CC([C@@H]([N:10]2[CH2:15][CH2:14][C@:13](CC(O)(C)C)([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)[O:12][C:11]2=[O:27])C)=CC=1.COC1C=C(B2OC(C)(C)C(C)(C)O2)C=CN=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]>[C:16]1([CH:13]2[O:12][C:11](=[O:27])[NH:10][CH2:15][CH2:14]2)[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=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 2410056-Phenyl-1,3-oxazinan-2-oneYield 274.8%

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-a30b21255d9d45cfa3596bc54a8a4094
Source dataset
uspto-grants-2012_02
Patent number
US08114868B2

Reaction notes

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