Tert-butyl 4-(1H-pyrrolo[2,3-B]pyridin-3-YL)-5,6-dihydropyridine-1(2H)-carboxylate → tert-butyl 4-(1H-pyrrolo[2,3-b]pyridin-3-yl)piperidine-1-carboxylate

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Reaction Steps

4-(1H-Pyrrolo[2,3-b]pyridin-3-yl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester (1 g, 3.3 mmol) in EtOH (25 mL) containing PtO2 (250 mg) was placed on a Parr hydrogenator at 60 psi H2. After 18 h the mixture was filtered through celite and evaporated to give 0.96 g (97%) of a white solid. TLC (silica, 50% EtOAc/hexanes): Rf=0.5. MS (electrospray): exact mass calculated for C17H23N3O22, 301.18; m/z found, 302.2 [M++H]. 1H NMR (CDCl3, 400 MHz) 10.95 (br s, 1H), 8.26 (dd, J=3.33 Hz, 1.37 Hz, 1H), 7.96 (dd, J=6.26 Hz, 1.57 Hz, 1H), 7.11 (s, 1H), 7.05 (dd, J=4.89 Hz, 3.13 Hz, 1H), 4.22 (br s, 2H), 3.00-2.79 (m, 3H), 1.99 (d, J=13.89 Hz, 2H), 1.74-1.60 (m, 2H), 1.47 (s, 9H).

Provenance & Evidence