The synthesis and structure of ferrocenylalkyl onium derivatives of nitrogen-containing heterocyclic compounds

The reactions of hydroxymethylferrocene, -hydroxyethylferrocene, and 1,1-bis(-hydroxyethyl)ferrocene withN-ferrocenylalkyl-substituted benzotriazoles, hexamethylenetetramine, and azaferrocene in the CH₂Cl₂ — 48% aqueous HBF₄ two-phase system affordedN-mono-,N-1,1-ferrocenylene-bis--alkylated, and 1,3-bis-ferrocenylalkylated tetrafluoroborates of the above-mentioned heterocyclic compounds in high yields. An X-ray structural study of 1,3-bis-(ferrocenylmethyl)benzotriazolium tetrafluoroborate confirmed unambiguously the 1,3-arrangement of the ferrocenylmethyl groups in the heterocycle.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 554–558, March, 1995.