Back to results
US 7,622,595 B2Granted
Substituted 1H-dihydropyrazoles, their preparation and use
AssigneeE.I. du Pont de Nemours and Company
InventorsGary David Annis, George Philip Lahm, Thomas Paul Selby, Thomas Martin Stevenson
Life of this patent
Estimating the term…
Abstract
This invention provides compounds of Formula I, methods for their preparation and use for preparing compounds of Formula II wherein R1, R2, R3, R5, R6, X and n are as defined in the disclosure. This invention also discloses preparation of compounds of Formula III wherein R1, R2, R7, R8, R9 and n are as defined in the disclosure. This invention also pertains to certain compounds of Formula 4 and 6 used to prepare compounds of Formula I. wherein R1, R2, R5, X and n are as defined in the disclosure.
Claims20
A compound of Formula II
- wherein R1 is CF3;
- each R2 is independently Cl or Br, and one R2 is at the 3-position;
- X is CR4;
- R4 is H, Cl or Br;
- R6 is H or C1 to C4 alkyl;
- and n is 0 to 3, provided when X is CH then n is at least 1.
3 more elements
Dependencies are inferred from the claim text.