in two positions at maximum specific activity. Starting with 100 mCi of sodium [2 14 C]acetate, 14.6 mCi at 105 mCi/mmol was obtained in 8 steps including the formation of [1,3 14 C]acetone in the pyrolysis of barium (2- 14 C]acetate. The key step was the formation of the dianion of [1,3- 14 C]acetone oxime and its condensation with L-proline methyl ester.
[ 14 C]ABT-418,(S)-3-[ 14 C]甲基-5-[N-甲基-2-
吡咯烷基][4- 14 C]
异恶唑盐酸盐,在两个位置以最大比活性被标记。从 100 mCi [2 14 C]
乙酸钠开始,分 8 个步骤获得 14.6 mCi,浓度为 105 mCi/mmol,包括在 (2- 14 C]
乙酸钡热解中形成 [1,3 14 C]
丙酮。关键步骤是形成[1,3- 14 C]
丙酮肟的二价阴离子并将其与
L-脯氨酸甲酯缩合。