Development of a Practical Synthesis of Functionalized Azaxanthene-Derived Nonsteroidal Glucocorticoid Receptor Modulators
作者:David A. Conlon、Kenneth J. Natalie、Nicolas Cuniere、Thomas M. Razler、Jason Zhu、Nuria de Mas、Steven Tymonko、Kenneth J. Fraunhoffer、Eric Sortore、Victor W. Rosso、Zhongmin Xu、Monica L. Adams、Anisha Patel、Jun Huang、Hua Gong、David S. Weinstein、Fernando Quiroz、Doris C. Chen
DOI:10.1021/acs.oprd.6b00035
日期:2016.5.20
3-b]pyridin-5-ol at the 5 position was accomplished via Lewis acid-catalyzed coupling with commercially available ((1-methoxy-2-methylprop-1-en-1-yl)oxy)trimethylsilane. A partial classical resolution coupled with a preparative chiral supercritical fluid chromatography (SFC) separation was used to isolate the desired enantiomer of the azaxanthene carboxylic acid that is a common intermediate for both compounds
报道了一种有效的途径来制备两个官能化的2-芳基-5 H -chromeno [2,3- b ]吡啶(金刚烷类)。向水杨醛中添加锂化的2,6-二氯吡啶,然后环化是确定形成氮杂黄嘌呤核的关键工艺改进。2-氯-5-的进一步阐述ħ -chromeno [2,3- b ]吡啶-5-醇在5位被通过与市售的((1-甲氧基-2-甲基丙-1-路易斯酸催化的偶联来完成烯-1-基)氧基)三甲基硅烷。使用部分经典拆分方法与制备型手性超临界流体色谱法(SFC)分离来分离所需的氮杂蒽吨羧酸的对映异构体,该杂合体是两种化合物的共同中间体1和2。Suzuki-Miyaura与适当取代的硼酸交叉偶联,然后与2-氨基-1,3,4-噻二唑缩合,可提供目标化合物的总收率约为10%。还讨论了使用稳定的无定形材料来支持功能性氮杂黄嘌呤1和2的临床比较。