Iodine → 2-benzyl 5-methyl 6-iodo-1,3-dihydro-2H-isoindole-2,5-dicarboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-benzyl 5-methyl 6-amino-1,3-dihydro-2H-isoindole-2,5-dicarboxylate (149 mg, 0.456 mmol) in CHCl3 (5 mL) was added t-butyl nitrite (108 uL, 0.912 mmol). The mixture was stirred for 20 min. I2 (34.7 mg, 1.37 mmol) was added and the resulting mixture was stirred at room temperature for 15 min. The mixture was then heated at 80° C. overnight. The reaction was quenched with sat. aq. NaHSO3 and extracted with CH2Cl2 (3×). The combined organic layers were washed with brine, dried (Na2SO4), filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel to provide 2-benzyl 5-methyl 6-iodo-1,3-dihydro-2H-isoindole-2,5-dicarboxylate. LCMS calc.=438.0; found=437.8 (M+H)+. 1H NMR (500 MHz, CDCl3): δ 7.94-7.88 (2 s, 1H); 7.77-7.71 (2 s, 1H); 7.44-7.32 (m, 5H); 5.25 (s, 2-H); 4.76 (t, J=11.6 Hz, 4H); 3.98-3.94 (2 s, 3H).

Provenance & Evidence