Patent ID: 8809524

Claim:
A method for making a compound of the formula (IA): wherein R 1A−1 represents a C 1-4 alkyl group, R 2 and R 3 taken together represent a C 2-5 alkylene group, R 4 , R 5 and R 6 each independently represents a halogen atom, optionally oxidized C 1-6 alkyl group, optionally protected hydroxyl group, trihalomethyl group, —SO 2 R 7 group, —SOR 7 group or —SR 7 group, R 7 represents a C 1-6 alkyl group or a phenyl, tolyl or xylyl group, indicates that the bond is attached in front of the sheet, m represents 0 or an integer from 1 to 3, n represents 0 or an integer from 1 to 4, and i represents 0 or an integer from 1 to 7, with the proviso that when m is 2 or more, each R 4 may be the same or different selected from the above-defined groups, when n is 2 or more, each R 5 may be the same or different selected from the above-defined groups, and when i is 2 or more, each R 6 may be the same or different selected from the above-defined groups, which comprises: subjecting a compound of formula (II): wherein R 2-1 , R 3-1 , and R 4-1 respectively have the same meanings as R 2 , R 3 , and R 4 , and other symbols have the meaning above, and a compound of formula (III): wherein R 5-1 and R 6-1 respectively have the same meanings as R 5 and R 6 , and other symbols have the same meanings as above, to an amidation reaction, optionally followed by a deprotection reaction.