Rearrangements Encountered in the Attempted Syntheses of Pyridoazepinone Carboxylic Acids
作者:William J. Sanders、Xiaolin Zhang、Rolf Wagner
DOI:10.1021/ol0481378
日期:2004.11.1
products. Seven-membered ring formation was attempted by ring expansion of a six-membered ring and by aldol ring closure. In each case, the major product resulted from rearrangement of the starting material without detection of the desired product. Ultimately, an isomeric pyridoazepinone ethyl ester was prepared; however, attempted saponification resulted in another unusual rearrangement. [reaction: see
尝试通过标准方法合成吡啶基ze庚酮羧酸(如33)仅导致异常和意想不到的重排产物。尝试通过六元环的扩环和羟醛环的闭合来形成七元环。在每种情况下,主要产品都是由于未检测到所需产品而对原料进行了重排而产生的。最终,制备了吡啶并ze庚酮乙酯的异构体。然而,尝试皂化导致了另一种异常的重新排列。[反应:看文字]