Trifluoroacetic acid → HCID 57965020, compound

Participants

Reaction Steps

4-(4-Phenoxy-pyrazolo[3,4-d]pyrimidin-1-yl)-piperidine-1-carboxylic acid isopropyl ester was prepared according to General Procedure D by the reaction of 4-(4-phenoxy-pyrazolo[3,4-d]pyrimidin-1-yl)-piperidine-1-carboxylic acid tert-butyl ester (from Step 1) with trifluoroacetic acid, followed by reaction of the resulting amine with isopropyl chloroformate (available from Aldrich Chemical Company, Inc., Milwaukee, Wis., USA). 1H NMR (400 MHz, DMSO-d6) δ 1.20 (d, 6H, J=6.2 Hz), 1.94-2.03 (m, 4H), 3.00-3.12 (m, 2H), 4.08-4.15 (m, 2H), 4.78-4.82 (m, 1H), 5.00-5.02 (m, 1H), 7.32-7.38 (m, 3H), 7.49-7.53 (m, 2H), 8.11 (s, 1H), 8.54 (s, 1H). Mass spectrum MH+=382.

Provenance & Evidence