1309360-29-9Relevant academic research and scientific papers
Hafnium triflate as an efficient catalyst for direct Friedel-Crafts reactions of chromene hemiacetals
Wu, Yan-Chao,Li, Hui-Jing,Liu, Li,Demoulin, Nicolas,Liu, Zhe,Wang, Dong,Chen, Yong-Jun
, p. 907 - 912 (2011/06/19)
The direct Friedel-Crafts reaction of chromene hemiacetals with indoles, furans and sterically hindered anilines has been accomplished with high selectivity and excellent yields in the presence of a catalytic amount of hafnium triflate [Hf(OTf)4/sub
Cascade reaction of β,γ-unsaturated α-ketoesters with phenols in trityl chloride/TFA system. Highly selective synthesis of 4-aryl-2H-chromenes and their applications
Wu, Yan-Chao,Li, Hui-Jing,Liu, Li,Liu, Zhe,Wang, Dong,Chen, Yong-Jun
, p. 2868 - 2877 (2011/05/12)
The treatment of β,γ-unsaturated α-ketoesters with phenols in the presence of trityl chloride and 4 A molecular sieves in refluxing trifluoroacetic acid afforded 4-aryl-2H-chromenes in high yields, in which a reverse of the regiochemistry of Jorgensen-Rut
