| abstract |
(57) [Summary] (Modified) [Constitution] A phenolic compound is condensed with diazosulfonyl chloride (about 50 to 100 mol% of the diazo moiety is 2, 1,4-diazo and 0 to about 50 mole% of the diazo moiety is 2,1,5-diazo, and the phenolic compound averages to about 60 mole% to about 60 mole% hydroxy groups esterified by diazosulfonyl chloride. A photosensitizer condensate, which comprises 100 mol% and the condensation is carried out in a lactone solvent in the presence of an acid scavenger), followed by the isolation of the photosensitizer condensate. [Effect] The diazonaphthoquinone ester can be provided without a substantial amount of complicated by-products, can be easily controlled, and does not cause quality deterioration even with slight variations in reaction temperature, time, base concentration and the like. |