Electrocatalytic chain transformation of salicylaldehyde and CH acids into substituted 4H-chromenes
作者:S. K. Feducovich、M. N. Elinson、A. S. Dorofeev、S. V. Gorbunov、R. F. Nasybullin、N. O. Stepanov、G. I. Nikishin
DOI:10.1007/s11172-008-0093-9
日期:2008.3
Electrochemically initiated catalytic chain transformation of salicylaldehydes and CH acids containing the cyano group in an ethanolicsolution in an undivided cell produced substituted 4H-chromenes in 85–95% yields.
4H-Chromenes and dihydropyrano[3,2-c]chromenes are obtained in good to excellent yields by a simple, mild and efficient procedure using poly(N,N'-dibromo-N-ethyl-benzene-1,3-disulfonamide) [PBBS] and N,N,N',N'-tetrabromobenzene-1,3-disulfonamide [TBBDA ] as catalysts