反应详情

1-{4-[4-(2-Fluoro-4-methanesulfonyl-phenylamino)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidin-1-yl}-2,2-dimethyl-propan-1-one was prepared according to General Procedure J 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 in dichloromethane followed by reaction with pivaloyl chloride (available from Aldrich Chemical Company, Inc., Milwaukee, Wis., USA). 1H NMR (400 MHz, DMSO-d6) δ 1.23 (s, 9H), 1.98-2.03 (m, 4H), 3.06-3.12 (m, 2H), 3.30 (methyl sulfonyl and water peak), 4.40-4.46 (m, 2H), 4.99-5.03 (m, 1H), 7.79-7.81 (m, 1H), 7.88-7.92 (m, 1H), 8.21-8.25 (m, 1H), 8.30-8.43 (m, 2H), 10.38 (s, 1H). Mass spectrum MH+=475.