PREPARATION OF 3,4-DIHYDRO-2H-BENZOPYRAN DERIVATIVE

• Main Authors: FUJITA YOSHIJI, SHIONO MANZOU, NISHIDA TAKUJI
• Format: Patent
• Language: English
• Published: 24.11.1983
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

PURPOSE:To obtain easily the titled compound useful as an intermediate for synthesizing optical active vitamin E and tocotrienol using inexpensively obtainable raw materials, by reacting hydroquinone (derivative) with a specific pyran derivative in the presence of a Lewis acid. CONSTITUTION:A compou...