| 摘要 |
NEW MATERIAL:A compound of formula I [R is phenyl which may be substituted with halogen, 1-4C alkyl, cyclohexyl, alkyl which may incorporate with R2 to form an N-heterocycle; R2 is 1-4C alkyl, forms an N-heterocycle with R1; X is H, halogen, 1-4C alkyl, 1-2C alkoxy; Y is H, halogen, 1-4C alkyl; R3 is halogen, 1-4C alkyl; n is 0-4; Z is 1-8C alkyl, substituted or unsubstituted aryl]. EXAMPLE:3-Pyrrolidino-7-(p-acetylanilino)fluorane. USE:A color-developing substance used in recording materials such as pressure-, heat-, electroheat- and photo-sensitive recording sheets. When contacting with a color developer, it develops high-concentration colors of reddish black, greenish black or black and keeps its initial color of recorded images even when exposed to sun light. PREPARATION:The reaction of 2-(2-hydroxy-4-amino)benzoylbenzoic acid of formula II with a diphenylamine of formula III gives the objective compound. |
