| abstract |
A process for producing a compound of formula ID:n nwhere R 1 is haloalkyl, R 2 and R 4 are alkyl, R 5 is generally hydrogen or alkyl and R 6 is an acid labile group, by reacting a compound containing a substituent -C(R 3 X)NCH 2 C(O)OR 4 , where R 3 is hydrogen or alkyl and X is O or S, with an alkali metal amide base and a compound R 6 NHCH(R 5 )C(O)R 7 where R 7 is an activated acid moiety. |