| 摘要 |
PURPOSE:To provide the title compound having significant absorption band in the infrared region, large in adsorption coefficient, good in solubility, useful for optical recording media, and capable of giving said media durability and light stability. CONSTITUTION:The objective compound of formula I or II (R1 to R8 are each H or monovalent organic residue; R1 and R2, R3 and R4, R5 and R6, and/or R7 and R8 may be combined into five- or six-membered ring; X is S, relevant hetero, or five-membered heterocycle of formula III which may be substituted with lower alkyl or halogen; Y is anoin). For example, the present compound of the formula I or II can be obtained by the following process: a reaction is made between a compound of formula IV and a second compound of formula V into a compound of formula VI, which is then reduced into an amino modification of formula VII. This compound is put to selective substitution (e.g. by alkylation or alkenylation) followed by oxidation. |
