Patent ID: 8846717

Claim:
A method, comprising: providing a composition including a first ratio between stereoisomers of a compound having the following formula (I): wherein X represents NO 2 , CN or COOR 4 ; L represents a single bond or R 1 , S and L taken together represents a 4-, 5- or 6-membered ring; R 1 represents (C 1 -C 4 ) alkyl; R 2 and R 3 are distinct from each other and individually represent hydrogen, methyl, ethyl, fluoro, chloro or bromo; n is 1 when L represents a single bond or is 0 when R 1 , S and L taken together represents a 4-, 5- or 6-membered ring; Y represents (C 1 -C 4 ) haloalkyl, F, Cl, Br, or I; and R 4 represents (C 1 -C 3 ) alkyl; and heating the composition in a manner effective to provide a second, distinct ratio between the stereoisomers.