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US 6,605,598 B1Granted
Chemically synthesized sugar esters for the control of soft-bodied arthropods
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorOrestes T. Chortyk
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Abstract
The invention relates to an improved process for the synthesis and application of sugar esters, that are useful as effective, environmentally-safe pesticides for the control of soft-bodied arthropod pests.
Claims15
A nonaqueous method for synthesizing low molecular weight aliphatic sugar esters comprising
- (a) dissolving a sugar in an aprotic polar organic solvent to form a first sugar solution,
- (b) dissolving an aliphatic acid chloride in a suitable solvent to form a first chloride solution,
- (C) adding pyridine to said first sugar solution to form a second sugar solution,
- (d) mixing said first chloride solution dropwise to said second sugar solution to cause an esterification reaction and form an esterification reaction solution,
- (e) adding a sodium bicarbonate solution after said esterification reaction to decompose any pyridine hydrochloride byproducts to form a product solution,
- (f) recovering sugar esters from said product solution to form a filtrate, evaporating said filtrate to dryness, and dissolving the dry filtrate in a solvent selected from the group consisting of acetone, methanol, chloroform, and mixtures thereof.
3 more elements
A pesticide composition effective for treating plants infested with anthropod pests comprising a compound having the structure
- wherein R1 and R3 are —C—R4 and R2 is either H or —C—R4 wherein R4 is selected from the group consisting of (CH2)2CH3, (CH2)3CH3, (CH2)4CH3, (CH2)5CH3, (CH2)6CH3, (CH2)7CH3, (CH2)8CH3, and (CH2)9CH3, and
- and aqueous carrier.
Dependencies are inferred from the claim text.