| 摘要 |
NEW MATERIAL:The compound of formula I [at least one of R1-R6 is (substituted) 2-8C alkyl, etc., and the others are H, 1-8C alkyl, 5-12C cycloalkyl, etc.; R1 and R2, R3 and R4 or R5 and R6 may together with adjacent N form morpholino, etc.]. EXAMPLE:3-Dimethylamino-6-(N-methyl-N-phenoxyethylamino)fluorene-9-spi ro-3' -(6'-dimethylamino)phthalide. USE:A color-developing substance for recording material such as pressure-sensitive recording sheet, heat-sensitive recording sheet, electro-thermal recording sheet, photo-sensitive recording sheet, etc. PREPARATION:The p-aminobenzaldehyde derivative of formula II is subjected to dehydrative condensation with m-aminobenzoic acid of formula III to obtain 3-(p-aminophenyl)-6-aminophthalide derivative of formula IV, which is subjected successively to oxidation, dehydrative condensation, hydrolysis, diazotization and cyclization. |
