反应详情

温度

140 °C

To ethyl 6-chloro-4-hydroxy-1,1-dimethyl-2-oxo-naphthalene-3-carboxylate (2.44 g, 8.28 mmol, see Example 2) and L-alanine t-butyl ester hydrochloride (2.26 g, 12.4 mmol), were added 1,4-dioxane (5.52 mL) and N-ethyl-N-isopropylpropan-2-amine (4.33 mL, 24.8 mmol). The reaction mixture was then heated in a microwave at 140° C. for 10 minutes. The reaction mixture was diluted with 150 mL of EtOAc, added to a separatory funnel, partitioned with NaHCO3 (saturated, aqueous), washed 3 times with 50 mL of NaHCO3 (saturated, aqueous), separated, dried over Na2SO4, and concentrated in vacuo to give the title compound (0.815 g) as a light yellow amorphous solid after flash chromatography. MS (m/z)=338(M+H-tBu)+.

1. additionadded to a separatory funnel
2. custompartitioned with NaHCO3 (saturated, aqueous)
3. washwashed 3 times with 50 mL of NaHCO3 (saturated, aqueous)
4. customseparated
5. dry with materialdried over Na2SO4
6. concentrationconcentrated in vacuo