PRODUCTION OF PHTHALIDE COMPOUND

• Main Authors: KANEMURA YOSHINOBU, HORIUCHI KENICHIRO, NISHIMURA TAKESHI, WADA MASARU, MATSUMOTO MANSUKE, NAWAMOTO SHINZO
• Format: Patent
• Language: English
• Published: 22.12.1998
• Edition: 6
• Subjects: ADHESIVES; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; DYES; GENERAL METHODS OF ORGANIC CHEMISTRY; HETEROCYCLIC COMPOUNDS; LAKES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; ORGANIC CHEMISTRY; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POLISHES; THEIR RELEVANT APPARATUS; TRANSPORTING

PROBLEM TO BE SOLVED: To obtain a phthalide compound useful as a coloring agent for coloring recording materials in a short time, high purity and high yield by oxidizing a triphenylmethane compound in the presence of an organic base. SOLUTION: A phthalide compound of formula I (R to R are each an al...