| abstract |
A compound of formula (XIIIa): (See formula) in which: L 2 is hydrogen, tert-butoxycarbonyl or benzyl; t is 1; m and p are 1; X is O; R 1 is any phenyl substituted with one or more of fluorine, chlorine, C 1-4 alkyl or C 1-4 alkoxy, or R 1 is phenyl substituted by R 35 and R 36; R 35 is hydrogen, cyano, S (O) 2 (C1-4 alkyl), S (O) 2 (C1-4 haloalkyl), halogen, C1-4 alkyl, C1-4 haloalkyl, C1-4 alkoxy or phenyl (optionally substituted by one or two halogen atoms or by a group C (O) NR 120 R 130, NR 90 C (O) R 100, S (O) 2R 150, S (O) 2NR 42 R 43 or NR 44 S (O) 2R 45 ); R 36 is hydrogen, halogen or C 1-4 alkyl; R 90 R 10, R 120 R 130 R 42, R 43 and R 44 are, independently, hydrogen, C 1-6 alkyl or phenyl; and, R 150 and R 45 are, independently, C 1-6 alkyl or phenyl. |