| 摘要 |
NEW MATERIAL:Compounds of formula I, wherein Y is H, Cl; R is a group of formula II (wherein l is 0.1; m, n are each 1,2; R<1> is a 1-4C alkyl); A is a group of formula III or IV (wherein B is Y or a group of formula V); X is an anion. EXAMPLE:Compound of formula VI. USE:Indelenine compds. which do not cause agglomeration nor crystallization during storage and lowering in a readout S/N ratio and are suitable for use as a material for an optical recording medium. PREPARATION:1 mol of a compd. of formula VII is condensed with 2mol of a compd. of formula VIII or IX (wherein D is a group of formula X) in the presence of a salt of a fatty acid (e.g. sodium acetate) as a catalyst in a dehydrating org. acid such as acetic anhydride or a mixture thereof with glacial acetic anhydride at 60-130 deg.C for 10-60min. If desired, the product is recrystallized from an alcohol. |
