c19)  United States  c12)  Patent Application Publication  Roques et al.  c10)  Pub. No.: US 2006/0069284 Al  (43)  Pub. Date:  Mar. 30, 2006  (54)  ESTERS OF ALLYL SUBSTITUTED BY A  DIFLUOROMETHYLENE GROUP, METHOD  FOR THE SYNTHESIS THEREOF AND USE  THEREOF  (75)  Inventors:  Nicolas Roques,  Gaillac (FR);  Laurent  Saint James,  Vourles (FR);  Jean-Marie  Bernard,  Saint Laurent D’  Agny (FR)  (21)  Appl. No.:  10/539,639  (22)  PCT Filed:  Dec. 17, 2003  (86)  PCT No.:  PCT/FR03/03780  (73)  Assignee:  RHODIA  CHIMIE,  92512  BOU› LOGNE BILLANCOURT CEDEX (FR)  (30)  Foreign Application Priority Data  Publication Classification  (57)  ABSTRACT  (51)  Int. Cl.  C07C 67102  (2006.01)  (52)  U.S. Cl.  ..............................................................  560/262  Dec. 20, 2002  (FR) ............................................ 02/16308  The subject matter of the present invention is compounds  forming an ally! ester in which the ally! group is substituted  by a difluoromethylene group; another subject matter of the  invention is a route for the synthesis of these compounds and  their use in cycloaddition processes for the synthesis of  nitrogenous heterocycles, in particular 3+2 cycloadditions.  Correspondence Address:  Jean-Louis Seugnet  Rhodia Inc  Intellectuual Property Dept  259 Prospect Plains Road CN-7500  Cranbury, NJ 08512 (US)  US 20060069284Al 