反应详情

4-[4-(2-Fluoro-4-methanesulfonyl-phenylamino)-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-(2-fluoro-4-methanesulfonyl-phenylamino)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidine-1-carboxylic acid tert-butyl ester (Example 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), 3.00-3.10 (m, 2H), 3.30 (methyl sulfonyl and water peak), 4.05-4.15 (m, 2H), 4.77-4.84 (m, 1H), 4.92-4.96 (m, 1H), 7.79-7.81 (m, 1H), 7.89-7.92 (m, 1H), 8.20-8.23 (m, 1H), 8.40-8.43 (m, 2H), 10.38 (s, 1H). Mass spectrum MH+=477.