Process for producing chromans

Details Process for producing chromans Process for producing chromans

1999-10-26

2000-10-17

McKane, Joseph K.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560106, 560130, 568662, 568664, C07C 43115, C07C 6984

Patent

active

061334715

ABSTRACT:
A process for producing chromans, comprising reacting a phenol, a formaldehyde and an alcohol in the presence of a secondary amine and an acid, to generate an alkoxymethylphenol compound with the ortho position to the phenolic hydroxyl group substituted with an alkoxymethyl group, and reacting the alkoxymethylphenol compound with an unsaturated compound having a carbon-carbon double bond.

REFERENCES:
patent: 4692555 (1987-09-01), Shin
patent: 5004758 (1991-04-01), Boehm et al.
patent: 5495026 (1996-02-01), Fukumoto et al.
"Daiyukikagaku", vol. 14, pp. 215-220, 1959.
Tsutomu Inoue, et al., Bull. Chem. Soc. Japan, vol. 63, No. 4, pp. 1062 to 1067, "A New Synthesis of O-Quinonemethides and Their Inter-and Inrramolecular Cyclization Reactions", 1990.
Kostas Karabelas, et al., J. Am. Chem. Soc., vol. 112, pp. 5372-5373, "(Trimethylsilyl)Methyl)-1,4-Benzoquinones, Generation and Trapping of O-Quinone Methides", Feb. 20, 1990.

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