Patent ID: 8378109

Claim:
A compound according to Formula I in which X is CH═CH, CH═N, N═CH, O, S, or NR 3 , where R 3 is hydrogen or lower alkyl; Y is O, S, or NR 3 ; is a double bond; Q is lower alkyl; R 1 is selected from the group consisting of hydrogen, halogen, halogen isotope, O-toluenesulfonyl, trialkyltin, and trialkylamine; or Q and R 1 taken together are null where n is 1 or 2; Z is independently halogen, halogen isotope, NO 2 , or trialkylamine; m is 1 and n is independently 0 to 3, inclusive; and R 2 is selected from the group consisting of hydrogen, lower alkyl, and a butoxycarbonyl group.