[13CD3]-TAK-459 (1A), an HSP90 inhibitor, was synthesized from [13CD3]-sodium methoxide in three steps in an overall yield of 29%. The key intermediate [13CD3]-2-methoxy-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine was synthesized in two steps from 2,6-dibromopyridine and stable isotope-labeled sodium methoxide. [14C]-TAK-459 (1B) was synthesized from [14C(U)]-guanidine hydrochloride in five steps in an overall radiochemical yield of 5.4%. The key intermediate, [14C]-(R)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one, was prepared by microwave-assisted condensation.
HSP90
抑制剂[13CD3]-TAK-459 (1A)由[13CD3]-
甲醇钠通过三步合成,总收率为29%。关键中间体[13CD3]-2-甲氧基-6-(4,4,5,5-四甲基-1,3,2-二氧
硼戊环-2-基)
吡啶由2,6-二
溴吡啶和稳定同位素标记的
甲醇钠通过两步合成。[14C]-TAK-459 (1B)由[14C(U)]-
盐酸胍通过五步合成,总放射
化学收率为5.4%。关键中间体[14C]-(R)-2-
氨基-7-(2-
溴-4-
氟苯基)-4-甲基-7,8-
二氢吡啶并[4,3-d]
嘧啶-5(6H)-酮通过微波辅助缩合制备。