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US 9,000,180 B2Granted
Processes for the production of N-substituted sulfoximine pyridine N-oxides
AssigneeDow AgroSciences LLC
InventorsDouglas C. Bland, Ronald Ross, Jr., Peter L. Johnson, Timothy C. Johnson
Life of this patent
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Abstract
In one form, processes for the production of certain N-substituted sulfoximine N-oxides are provided. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the description.
Claims10
A process for preparing an N-oxidized sulfoximine compound of formula (I)
- wherein
- X represents NO2, CN, COOR4 or CONH2;
- R1 represents (C1-C4) alkyl;
- R2 and R3 individually represent hydrogen, methyl, ethyl, flouro, chloro or bromo;
- n is an integer from 0-3;
- Y represents (C1-C4) haloalkyl, F, Cl, Br, or I;
- and
- R4 represents (C1-C3) alkyl;
- which includes performing an oxidation of a compound of formula (II)
- wherein X, R1, R2, R3, n, Y and R4 are as previously defined and the oxidation includes treating the compound of formula (II) with urea hydrogen peroxide and trifluoroacetic anhydride.
7 more elements
A process for preparing an N-oxidized sulfoximine compound of formula (I)
- wherein
- X represents NO2, CN, COOR1 or CONH2;
- Y represents (C1-C4) haloalkyl, F, Cl, Br, or I;
- and
- R1 represents (C1-C4) alkyl;
- which includes performing an oxidation of a compound of formula (II)
- wherein X, Y and R1 are as previously defined and the oxidation includes treating the compound of formula (II) with urea hydrogen peroxide and trifluoroacetic anhydride.
4 more elements
Dependencies are inferred from the claim text.