摘要 |
NEW MATERIAL:The compound of formula I (R is phenyl which may have at least one substituent group selected from lower alkyl, lower alkoxy and halogen). EXAMPLE:Phenoxyacetaldehyde-2-pyridylhydrazone. USE:A coupler for diazonium salt. It gives a diazo copying material having high developability and forming an image having excellent light resistance. PREPARATION2-Pyridylhydrazine of formula II is made to react with the phenoxyacetaldehyde of formula III (R<1> is H, lower alkyl, lower alkoxy or halogen) in a solvent (preferably lower alcohol, etc.) at 20-30 deg.C.
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