反应详情

A solution of concentrated H2SO4 at 0° C. was treated with 1-indanone (6.00 g, 45.4 mmol) then treated dropwise with KNO3 (5.00 g, 49.94 mmol) in concentrated H2SO4 while maintaining the internal temperature at no more than 15° C. The reaction was stirred for 1 hour after the addition was complete, then poured onto ice. The resulting solids were collected by filtration, washed with water, and dried under vacuum to give a 4:1 mixture of 6-nitro- and 4-nitro-1-indanone (5.04 g, 63%). MS (ESI(+) m/e 178 (M+H)+, 195 (M+NH4)+; MS (ESI(−)) m/e 176 (M−H)−; 1H NMR (300 MHz, DMSO-d6, 6-nitro-1-indanone) δ 8.49 (dd, 1H), 8.29 (d, 1H), 7.87 (d, 1H), 3.25 (m, 2H), 2.78 (m, 2H); 1H NMR (300 MHz, DMSO-d6), 4-nitro-1-indanone) δ 8.51 (dd, 1H), 8.07 (dd, 1H), 7.74 (t, 1H), 3.53 (m, 2H), 2.76 (m, 2H).

1. temperaturewhile maintaining the internal temperature at no more than 15° C
2. additionafter the addition
3. additionpoured onto ice
4. filtrationThe resulting solids were collected by filtration
5. washwashed with water
6. customdried under vacuum
7. customto give