Synthesis and Absolute Configuration of the Enantiomers of 7-Fluoro-1-methyl-3-(methylsulfinyl)-4(1H)-quinolinone (Flosequinan).
作者:Seiji MORITA、Kenji OHTSUBO、Jun MATSUBARA、Tadaaki OHTANI、Minoru UCHIDA、Masaru KIDO、Takefumi SHIMIZU
DOI:10.1248/cpb.42.2157
日期:——
The enantiomers of 7-fluoro-1-methyl-3-(methylsulfinyl)-4(1H)-quinolinone [(±)-1, flosequinan], a new drug for the treatment of heart failure, were synthesized from the optically active (R)-α-methylbenzylamine derivatives of quinoline. The key intermediates, (R)-α-methylbenzylamine derivatives, were prepared by diastereomeric separation. The configuration of (+)-1 was assigned on the basis of an X-ray crystallographic analysis of the synthetic precursor (4a). The absolute configuration was found to be (R)-(+)-1 and (S)-(-)-1.
7-氟-1-甲基-3-(甲基亚磺酰基)-4(1H)-喹啉酮的对映异构体(±)-1,一种治疗心力衰竭的新药,是从喹啉的光学活性(R)-α-甲基苄胺衍生物合成的。关键中间体(R)-α-甲基苄胺衍生物是通过非对映异构体分离制备的。根据合成前体(4a)的X射线晶体学分析,确定了(+)-1的构型。发现绝对构型为(R)-(+)-1和(S)-(-)-1。