Patent ID: 6130341
Filing Date: 2000-10-10
Classification: C07C,C07D

Abstract:
A process for producing a chroman, comprising:step 1: comprising reacting a phenol compound having at least one of the ortho positions to the phenolic hydroxyl group being unsubstituted, a formaldehyde and an alcohol in the presence of a secondary amine and an acid at a temperature within a range of 50 to 130.degree. C., to produce an alkoxymethylphenol compound with the ortho position to the phenolic hydroxyl group being substituted with an alkoxymethyl group, and then removing at least a portion of the secondary amine from the reaction mixture after production of the alkoxymethylphenol compound; andstep 2: comprising reacting the alkoxymethylphenol compound with a compound having a carbon--carbon double bond at a temperature of 150.degree. C. or more, to produce the chroman, wherein the compound having a carbon--carbon double bond has no hydroxyl group within the molecule and has no electron withdrawing group directly bonded to a carbon atom composing the carbon--carbon double bond thereof.