(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

Participants

Reaction Steps

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).

Provenance & Evidence