Lewis Acid Catalyzed Benzylic C-H Bond Functionalization of Azaarenes; Addition to Imines and Enones
作者:Shigeki Matsunaga、Motomu Kanai、Hirotomo Komai、Tatsuhiko Yoshino
DOI:10.1055/s-0031-1291041
日期:2012.7
Y(OTf)3, were essential to promote the 1,4-addition of alkyl-substituted azaarenes to enones, and products were obtained in 60–96% yield. Lewis acid catalyzed benzylic C–H bond functionalization of alkyl-substituted azaarenes is described. The addition to N-tosyl imines proceeded under solvent-free conditions using various Lewis acids. Cu(OTf)2 was the best Lewis acid, and 1,2-addition proceeded at
摘要 描述了路易斯酸催化烷基取代的氮杂芳烃的苄基C–H键官能化。使用各种路易斯酸在无溶剂条件下将N-甲苯磺酰基亚胺加成。Cu(OTf)2是最好的路易斯酸,1,2-加成反应在60–120°C进行,产率为23–92%。另一方面,强路易斯酸性稀土金属三氟甲磺酸酯Sc(OTf)3和Y(OTf)3对于促进烷基取代的氮杂芳烃向烯酮的1,4-加成反应至关重要,得到的产物为60 –96%的产率。 描述了路易斯酸催化烷基取代的氮杂芳烃的苄基C–H键官能化。使用各种路易斯酸在无溶剂条件下将N-甲苯磺酰基亚胺加成。Cu(OTf)2是最好的路易斯酸,1,2-加成反应在60–120°C进行,产率为23–92%。另一方面,强路易斯酸性稀土金属三氟甲磺酸酯Sc(OTf)3和Y(OTf)3对于促进烷基取代的氮杂芳烃向烯酮的1,4-加成反应至关重要,得到的产物为60 –96%的产率。