反应详情

A mixture of (R)-tert-butyl 2-(aminomethyl)morpholine-4-carboxylate (1.0 equiv.), 2-hydroxyacetic acid (1.80 equiv.), N1-((ethylimino)methylene)-N3,N3-dimethylpropane-1,3-diamine hydrochloride (2.0 equiv.), and N,N-dimethylpyridin-4-amine (0.20 equiv.) was stirred in DCM (0.1 M) at room temperature overnight. The reaction was quenched with water and washed (3×) with water. The combined aqueous fractions were then back-extracted with chloroform (4×) and the combined organics were dried over Na2SO4, filtered, and concentrated. The resulting oil was passed through a pad of SiO2 gel using 5-50% MeOH/DCM and concentrated to yield (R)-tert-butyl 2-((2-hydroxyacetamido)methyl)morpholine-4-carboxylate as an oil. LCMS (m/z) (M+H)=175.1 (-Boc), Rt=0.55 min.

1. customThe reaction was quenched with water
2. washwashed (3×) with water
3. extractionThe combined aqueous fractions were then back-extracted with chloroform (4×)
4. dry with materialthe combined organics were dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. concentrationconcentrated