tetra-n-butylammonium tetrafluoroborate in 1,4-dioxane
T=101°C; 10 h;
参考文献
Katritzky, Alan R.; Saba, Antonio; Patel, Ranjan C.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1981 , p. 1492 - 1494