Citation

Calder IC Sasse WHF (1968) Aromatic nitrogen bridgehead compounds. II. The synthesis of 1-Acylmethyl-2-(2-pyridyl)pyridinium salts and their cyclization to 6-substituted Dipyrido[1,2-c:2',1'-e]imidazolium salts. Australian Journal of Chemistry 21, 1023-1036.

https://doi.org/10.1071/CH9681023