反应详情

温度

80 °C

(S)-methyl azetidine-2-carboxylate hydrochloride (1 g, 6.60 mmol) was diluted with Tetrahydrofuran (Volume: 20 ml) and treated with TRIETHYLAMINE (0.919 ml, 6.60 mmol). The reaction mixture was stirred vigorously and sonicated periodically, until a fine suspension resulted. This was stirred for 1 h and filtered through a small plug of celite. The plug was washed well with THF (20 mL) and the combined filtrate and washes were treated with methyl 6-chloro-5-nitronicotinate (0.714 g, 3.30 mmol). The reaction mixture was concentrated in vacuo and heated briefly (5 min) to 80° C. LCMS showed complete conversion. The reaction mixture was diluted with DCM (10 mL) and purified using flash column chromatography on silica gel (80 g SiO2, 20-30% ethyl acetate in hexanes) to afford the title compound (S)-methyl 6-(2-(methoxycarbonyl)azetidin-1-yl)-5-nitronicotinate (0.90 g, 3.05 mmol, 92% yield) as a yellow oil. [M+H] calc'd for C12H13N3O6, 295; found, 295.

1. customsonicated periodically, until a fine suspension
2. customresulted
3. stirringThis was stirred for 1 h
4. filtrationfiltered through a small plug of celite
5. washThe plug was washed well with THF (20 mL)
6. concentrationThe reaction mixture was concentrated in vacuo
7. additionThe reaction mixture was diluted with DCM (10 mL)
8. custompurified