Bulky Thioureas as New Ligands for Gold(I)-Catalyzed Cyclization of Acetylenic 1,3-Dicarbonyl Compounds
作者:Dan Yang、Jie-Hui Pan、Min Yang、Qiang Gao、Nian-Yong Zhu
DOI:10.1055/s-2007-983804
日期:2007.8
N′-disubstituted cyclic thioureas as ligands for gold(I) catalysis. X-ray crystal structures of the thiourea-gold(I) complexes presented important information about the nature of the complexation. These complexes were found to be active catalysts for the cyclization of 1,3-dicarbonyl compounds with alkynes (Conia-ene reaction). Various acetylenic 1,3-dicarbonyl compounds underwent cycloisomerization to give mono-
我们说明了第一次使用庞大的 N,N'-二取代环状硫脲作为金 (I) 催化的配体。硫脲-金 (I) 配合物的 X 射线晶体结构提供了有关配合物性质的重要信息。发现这些配合物是 1,3-二羰基化合物与炔烃的环化反应(Conia-ene 反应)的活性催化剂。在 1 mol% 的硫脲-氯化金 (I) 络合物和三氟甲磺酸银存在下,各种炔属 1,3-二羰基化合物经过环化异构化得到单环和双环烯属环戊烷。