Patent ID: 7115766

Claim:
A compound having the formula: wherein R 1 is hydrogen, acyloxymethyl of 1–4 carbons, formyl, acyl, polyfluoroacyl of 2–3 carbons, optionally substituted alkyl and aryl sulfonyl, optionally substituted alkyl and aryl phosphoryl, or R 1 together with R 4 and —N—C α —C(O)— forms a 4–7 membered ring, with bridging atoms being C, O, N, P, or S, or combinations thereof; R 2 is hydrogen, C 2 –C 7 normal, branched, cyclic saturated, cyclic unsaturated alkyl and alkoxyalkyl, optionally substituted tert-butyloxycarbonyl, optionally substituted benzyloxycarbonyl, formyl, acyl, polyfluoroacyl of 2–3 carbons, optionally substituted alkyl and aryl sulfonyl, or optionally substituted alkyl and aryl phosphoryl; R 4 is OtBu, OCH 3 , C 2 –C 7 normal, branched, cyclic saturated, cyclic unsaturated alkoxy, and or R 4 together with R 1 and —N—C α C(O)— forms a 4–7 membered ring, with bridging atoms being C, O, N, P, or S, or combinations thereof; X is halogen, NO 2 , N 2 + , N + (CH 3 ) 3 , S + (CH 3 ) 2 , or aryl iodonium; Y is hydrogen, fluorinated alkyl, or NO 2 ; Z is fluorinated alkyl or NO 2 ; and R 5 is hydrogen, OtBu, OCH 3 , C 2 –C 7 normal, branched, cyclic saturated, or cyclic unsaturated alkoxy, acyl, halogen, azide or acylamide.