Oxidation and dehydrohalogenation of halotetrahydropyrans

Details Oxidation and dehydrohalogenation of halotetrahydropyrans Oxidation and dehydrohalogenation of halotetrahydropyrans

1973-04-17

1976-01-06

Daus, Donald G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D30930

Patent

active

039312364

ABSTRACT:
A halotetrahydropyran is oxidized and dehydrohalogenated employing oxygen and a free radical initiator.
4-Chlorotetrahydropyran is converted to 5,6-dihydro-1,2-pyrone using 2,2'-azobis(2-methylpropionitrile) under elevated oxygen pressure and at a temperature of the order of about 170.degree.F.

REFERENCES:
patent: 2453890 (1948-11-01), Bremner et al.
patent: 3527771 (1970-09-01), Stapp
Wagner and Zook, Synthetic Organic Chemistry, New York, Wiley & Sons, 1953, pp. 35-38 relied on.

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