PRODUCTION PROCESS FOR TETRAHYDRONAPHTHODIAZEPINES AND PRODUCTION OF SQUALIRIUM DYE

摘要

PROBLEM TO BE SOLVED: To provide a novel production process that can simply obtain a specific tetrahydronaphthodiazepine in high yield and provide a novel production process that can simply obtain a specific squalirium dye. SOLUTION: A tetrahydronaphthodiazepine represented by the general formula (I) (R is a hydrocarbon group bearing 3 or more carbon atoms or a heterocyclic group; R1 and R2 are each independently from each other H or a group that may be substituted on the nitrogen atoms; and R3-R8 are each identical to or different from one another, and independently H or a group that may be substituted on the naphthalene ring where either one of R5 or R6 represents H) is produced via the transesterification reaction.