tert-butyl (3aS,6aS)-3-oxo-1,2,3a,4,6,6a-hexahydropyrrolo[3,4-c]pyrrole-5-carboxylate

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Following general N—C coupling procedure 1, 5-bromo-2-nitropyridine (4.71 g, 23.2 mmol, 1.05 eq) was combined with cis-tert-butyl 4-oxohexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate (5 g, 22.1 mmol, 1.0 eq), which after silica gel purification gave cis-tert-butyl 5-(6-nitropyridin-3-yl)-4-oxohexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate (6.3 g) in 81% yield. 1H NMR (400 MHz, CDCl3) δ ppm 8.75 (m, 2H), 8.34 (d, J=9.09 Hz, 1H), 4.20 (dd, J1=9.85 Hz, J2=6.82 Hz, 1H), 4.02-3.85 (m, 2H), 3.80 (d, J=10.11 Hz, 1H), 3.68 (m, 1H), 1.52-1.43 (m, 3H). after silica gel purification