International Journal of Economic Research. Том 13. 2016. С. 2379-2390
1,3-Diferrocenylbenzene and 1,3,5-triferrocenylbenzene were isolated from the reaction mixture obtained by cyclocondensation of acetylferrocene with triethyl orthoformate under sonication in the presence of p-toluenesulfonic acid at 20—160 °C. © 2016, Springer Science+Business Media New York.