首次铜催化的分子内酰胺化反应取代了4-碘吡唑,从而合成了Pyrazolo [4,3 - b ] -pyridin -5-ones †
摘要:
描述了一种空前的铜催化的取代的4-碘吡唑的分子内酰胺化反应,该反应是通过Baylis-Hillman或Horner-Wadsworth-Emmons化学方法生成的,用于合成吡唑并[4,3 - b ]吡啶-5-酮。另外,已经研究了丙烯酰胺的立体化学对交叉偶联反应的影响,并且表明仅Z-异构体有利于进行分子内环化。
First Copper-Catalyzed Intramolecular Amidation in Substituted 4-Iodopyrazoles Leading to the Synthesis of Pyrazolo[4,3-<i>b</i>]- pyridin-5-ones
作者:Somnath Nag、Maloy Nayak、Sanjay Batra
DOI:10.1002/adsc.200900438
日期:2009.11
An unprecedented copper-catalyzedintramolecularamidation of substituted 4-iodopyrazoles generated either via Baylis–Hillman or Horner–Wadsworth–Emmons chemistry for the synthesis of pyrazolo[4,3-b]pyridine-5-ones is described. In addition, the effect of the stereochemistry of the acrylamide on the cross-coupling reaction has been investigated and it is demonstrated that only the Z-isomer is favoured
描述了一种空前的铜催化的取代的4-碘吡唑的分子内酰胺化反应,该反应是通过Baylis-Hillman或Horner-Wadsworth-Emmons化学方法生成的,用于合成吡唑并[4,3 - b ]吡啶-5-酮。另外,已经研究了丙烯酰胺的立体化学对交叉偶联反应的影响,并且表明仅Z-异构体有利于进行分子内环化。