A novel and efficient one-pot synthesis of furo[3′,4′:5,6]pyrido[2,3-c]pyrazole derivatives using organocatalysts
作者:Chun-Ling Shi、Da-Qing Shi、Sung Hong Kim、Zhi-Bin Huang、Shun-Jun Ji、Min Ji
DOI:10.1016/j.tet.2007.12.053
日期:2008.3
A novel approach to one-pot synthesis of dihydrofuro[3′,4′:5,6]pyrido[2,3-c]pyrazole and indeno[2′,1′:5,6]pyrido[2,3-c]pyrazole derivatives have been investigated using organocatalysts that are recyclable. This new protocol has the advantages of environmental friendliness, higher yield, low cost, as well as convenient operation. The catalytic efficiency of various small organocatalysts such as l-proline
一锅合成二氢呋喃[3',4':5,6]吡啶[2,3- c ]吡唑和茚并[2',1':5,6]吡啶[2,3- c]的新方法已经使用可回收的有机催化剂研究了对吡唑衍生物。该新协议具有环境友好,产量高,成本低以及操作方便的优点。还研究了各种小的有机催化剂,例如l-脯氨酸,反式-4-羟基-1-脯氨酸,l-硫代脯氨酸,辛可尼定,(+)-辛可宁和dl-2-苯基甘氨酸的催化效率。