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99A was hydrogenated in MeOH with 10percent Pd/C (40 mg) with a hydrogen balloon for 8 h. The Pd/C was removed by filtration. The filtrate was condensed to give 99B (80 mg, 87percent yield). 1H NMR (400 MHz, Methanol-d4) δ ppm 6.65 (dd, J=5.71, 2.64 Hz, 1H) 7.27 (d, J=2.20 Hz, 1H) 8.03 (d, J=5.71 Hz, 1 H).
With chloro-trimethyl-silane; water; at 20.0℃; for 1.0h;
4-Nitropicolinonitrile (100 mg, 0.67 mmol), chlorotrimethylsilane (0.17 mL, 1.4 mmol) and H2O (0.024 mL, 1.4 mmol) was sonicated in a sonicator at rt for 1.0 h. It was diluted with EtOAc, washed with NaHCO3, brine and dried over Na2SO4. After removal of solvent, 99A (134 mg, 100% yield) was obtained as a solid. 1H NMR (400 MHz, Methanol-d4) δ ppm 8.29 (dd, J=5.27, 2.20 Hz, 1H) 8.74 (d, J=2.20 Hz, 1H) 8.98 (d, J=5.27 Hz, 1H).
With hydrogen;palladium 10% on activated carbon; In methanol; for 8h;
99A was hydrogenated in MeOH with 10% Pd/C (40 mg) with a hydrogen balloon for 8 h. The Pd/C was removed by filtration. The filtrate was condensed to give 99B (80 mg, 87% yield). 1H NMR (400 MHz, Methanol-d4) delta ppm 6.65 (dd, J=5.71, 2.64 Hz, 1H) 7.27 (d, J=2.20 Hz, 1H) 8.03 (d, J=5.71 Hz, 1 H).
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