Patent ID: 6861564

Claim:
A compound having the structure of formula (4), wherein W is hydrogen or a protecting group; and wherein X and Y are taken together with the carbon to which they are attached to form a (C 4 -C 8 )cycloalkyl ring or (C 5 -C 8 )cycloalkenyl ring, provided that the (C 4 -C 8 )cycloalkyl ring or (C 5 -C 8 )cycloalkenyl ring is not aromatic; and wherein the (C 4 -C 8 )cycloalkyl ring or (C 5 -C 8 )cycloalkenyl ring is optionally substituted by one to three independently selected groups Z, where Z is selected from the group consisting of cyano; halo; (C 1 -C 6 )alkyl; aryl; (C 2 -C 9 )heterocycloalkyl; (C 2 -C 9 )heteroaryl; aryl(C 1 -C 6 )alkyl-; ═O; ═CHO(C 1 -C 6 )alkyl; amino; hydroxy; (C 1 -C 6 )alkoxy; aryl(C -C 6 )alkoxy-; (C 1 -C 6 )acyl; (C 1 -C 6 )alkylamino-; aryl(C 1 -C 6 )alkylamino-; amino(C 1 -C 6 )alkyl-; (C 1 -C 6 )alkoxy-CO—NH—; (C 1 -C 6 )alkylamino-CO—; (C 2 -C 6 )alkenyl; (C 2 -C 6 )alkynyl; hydroxy(C 1 -C 6 )alkyl-; (C 1 -C 6 )alkoxy(C 1 -C 6 )alkyl-; (C 1 -C 6 )acyloxy(C 1 -C 6 )alkyl-; nitro; cyano(C 1 -C 6 )alkyl-; halo(C 1 -C 6 )alkyl-; nitro(C 1 -C 6 )alkyl-; trifluoromethyl; trifluoromethyl(C 1 -C 6 )alkyl-; (C 1 -C 6 )acylamino-; (C 1 -C 6 )acylamino(C 1 -C 6 )alkyl-; (C 1 -C 6 )alkoxy(C 1 -C 6 )acylamino-; amino(C 1 -C 6 )acyl-; amino(C 1 -C 6 )acyl(C 1 -C 6 )alkyl-; (C 1 -C 6 )alkylamino(C 1 -C 6 )acyl-; ((C 1 -C 6 )alkyl) 2 amino(C 1 -C 6 )acyl-; —CO 2 R 2 ; —(C 1 -C 6 )alkyl-CO 2 R 2 ; —C(O)N(R 2 ) 2 ; —(C 1 -C 6 )alkyl-C(O)N(R 2 ) 2 ; R 2 ON═; R 2 ON═(C 1 -C 6 )alkyl-; R 2 ON═CR 2 (C 1 -C 6 )alkyl-; —NR 2 (OR 2 ); —(C 1 -C 6 )alkyl-NR 2 (OR 2 ); —C(O)(NR 2 OR 2 ); —(C 1 -C 6 )alkyl-C(O)(NR 2 OR 2 ); —S(O) m R 2 ; wherein each R 2 is independently selected from hydrogen, (C 1 -C 6 )alkyl, aryl, or aryl(C 1 -C 6 )alkyl-; R 3 C(O)O—, wherein R 3 is (C 1 -C 6 )alkyl, aryl, or aryl(C 1 -C 6 )alkyl-; R 3 C(O)O—(C 1 -C 6 )alkyl-; R 4 R 5 N—C(O)—O—; R 4 R 5 NS(O) 2 —; R 4 R 5 NS(O) 2 (C 1 -C 6 )alkyl-; R 4 S(O) 2 R 5 N—; R 4 S(O) 2 R 5 N(C 1 -C 6 )alkyl-; wherein m is 0, 1, or 2, and R 4 and R 5 are each independently selected from hydrogen or (C 1 -C 6 )alkyl; —C(═NR 6 )(N(R 4 ) 2 ); —(C 1 -C 6 )alkyl-C(═NR 6 )(N(R 4 ) 2 wherein R 6 represents OR 2 or R 2 wherein R 2 is defined as above; —OC(O)aryl(C 1 -C 6 )alkyl; —NH(C 1 -C 6 )alkyl; aryl(C 1 -C 6 )alkyl-HN—; and a ketal.