A systematic study of Knoevenagel reaction and Nazarov cyclization was made on variety of less reactive carbonyl compounds such as $\beta}$-ketoesters, 1,3-diketones and cyclic active methylene compounds using $Yb(OTf)_3$ as the catalyst. Recycling study confirms reusability of the catalyst without much loss of activity.
系统研究了在使用
$Yb(OTf)_3$作为催化剂的情况下,
$\beta}$-
酮酯、1,3-二酮和环状活性亚甲基化合物等各种低反应性羰基化合物上的Knoevenagel反应和Nazarov环化反应。回收研究证实了催化剂的可重复使用性,且活性损失不大。