Patent ID: 8071785

Claim:
A method of making compound of formula I, comprising: (a) providing dry 18 F; (b) providing a solution of starting material of formula II wherein R 1 is H, Cl, Br, I, F, Me, NO 2 , or OMe; R 2 is an alkyl group; R 3 is a C 1 -C 4 straight or branched alkyl chain, and L is a leaving group; (c) adding the solution of starting material to dry 18 F and heating the mixture for a predetermined period of time; and (d) collecting the resultant compound of formula I: wherein R 1 is H, Cl, Br, I, F, Me, NO 2 , or OMe; R 2 is an alkyl group; R 3 is a C 1 -C 4 straight or branched alkyl chain, or pharmaceutically acceptable salts thereof.