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US 6,965,032 B2Granted
Substituted dihydro 3-halo-1h-pyrazole-5-carboxylates and their preparation and use
AssigneeE. I. Du Pont de Nemours and Company
InventorJohn Herbert Freudenberger
Life of this patent
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Abstract
This invention relates to a compound of Formula I, a method for its preparation and its use in the preparation of a compound of Formula II wherein R1, R2, R3, X and n are as defined in the disclosure. This invention also discloses preparation of compounds of Formula III wherein R1, R2, R6, R7, R8 and n are as defined in the disclosure. Also disclosed are certain intermediates of Formula 4 for the preparation of compounds of Formula I wherein X is N and R2, R3 and n are as defined in the disclosure.
Claims8
A compound of Formula I
- wherein
- R1 is halogen;
- each R2 is independently C1-C4 alkyl, C2-C4 alkenyl, C2-C4 alkynyl, C3-C6 cycloalkyl, C1-C4 haloalkyl, C2-C4 haloalkenyl, C2-C4 haloalkynyl, C3-C6 halocycloalkyl, halogen, CN, NO2, C1-C4 alkoxy, C1-C4 haloalkoxy, C1-C4 alkylthio, C1-C4 alkylsulfinyl, C1-C4 alkylsulfonyl, C1-C4 alkylamino, C2-C8 dialkylamino, C3-C6 cycloalkylamino, C3-C6 (alkyl)cycloalkylamino, C2-C4 alkylcarbonyl, C2-C6 alkoxycarbonyl, C2-C6 alkylaminocarbonyl, C3-C8 dialkylaminocarbonyl or C3-C6 trialkylsilyl;
- R3 is H or C1-C4 alkyl;
- X is N or CR4;
- R4 is H or R2;
- and
- n is 0 to 3, provided when X is CH then n is at least 1.
5 more elements
Dependencies are inferred from the claim text.