Process of preparing thiopyrylium sensitizing dyes

Abstract

Abstract A method of preparing a compound of the general formula: ##STR1## in which: R 1 and R 2 independently represent a hydrogen atom, an alkyl or substituted alkyl group, an aryl or substituted aryl group, an aralkyl or substituted aralkyl group, a cycloaliphatic or substituted cycloaliphatic group or a heterocyclic or substituted heterocyclic group providing R 1 and R 2 do not both represent cyclic groups of aromatic nature, or R 1 and R 2 together may represent the necessary atoms to complete a non-aromatic heterocyclic ring, R 3 , R 4 , R 5 and R 6 independently represent a hydrogen atom or any substituent providing the sum of their σ p constants has a value of less than +0.5, or R 3 and R 4 and/or R 5 and R 6 may represent the necessary atoms to complete an alicyclic or aromatic ring, R 3 and R 2 and/or R 1 and R 6 may represent the necessary atoms to complete a non-aromatic heterocyclic ring, R 7 and R 9 independently represent a hydrogen atom or any carbon linked substituent containing up to 16 carbon atoms, R 8 and R 10 independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or any two adjacent substituents R 7 , R 8 , R 9 and R 10 together may complete an alicyclic or aromatic ring, and X - represents an anion, comprising reacting an amine of the general formula: ##STR2## in which R 1 to R 6 are as defined above, with a thiopyrylium salt of the general formula: ##STR3## in which X - and R 7 to R 10 are as defined above, to yield the desired compound. The compounds of formula (I), many of which are new, are useful as sensitizers or photoconductors.

Inventors

• 👤 Alan R. Katritzky
• 👤 Basil J. Graphakos
• 👤 Girard A. F. Lhommet
• 👤 Kenneth Reynolds

Bibliographic Details