Uniroyal Inc.

Michael A Puttock

Ethel Ellen Felauer

Bruce A Graham

Robert W Neidermyer

2,3-Dihydro-5,6-diphenyl-1,4-oxathiin is prepared by reacting benzoin and 2-mercaptoethanol in an alkanol solvent of 2 to 8 carbon atoms and an acidic catalyst. The use of alcohol solvent in lieu of aromatic solvents gives much greater purity with much better yields.

Process for the preparation of 2,3-dihydro-5,6-diphenyl-1,4-oxathiin

Substituted 2,3-dihydro-1,4-oxathiins of the formula ##STR1## display useful plant growth regulant effects including herbicidal effects. Examples are 2,3-dihydro-5,6-diphenyl-1,4-oxathiin, and 2,3-dihydro-5-(4-methylphenyl)-6-phenyl-1,4-oxathiin 4-oxide. The compounds are useful for the selective control of grasses and as dwarfing agents, as well as for inhibition of vegetative and reproductive axillary growth, and for increasing the sugar content of sugar producing species. A number of these are new compounds.

Substituted 2,3-dihydro-1,4-oxathiin plant growth regulants

Plant growth regulation using certain substituted

Substituted 2,3-dihydro-1,4-oxathiin plant growth

Substituted 2,3-dihydro-1,4-oxathiins of the formula ##SPC1## Display useful plant growth regulant effects including herbicidal effects. Examples are 2,3-dihydro-5,6-diphenyl-1,4-oxathiin, and 2,3-dihydro-5-(4-methyl-phenyl)-6-phenyl-1,4-oxathiin 4-oxide. The compounds are useful for the selective control of grasses and as dwarfing agents, as well as for inhibition of vegetative and reproductive axillary growth, and for increasing the sugar content of sugar producing species. A number of these are new compounds.

Growing community of inventors

Guelph, Canada

Michael A Puttock