| 摘要 |
A chemic compound having the formula: wherein P1 is a hydroxyl protecting group, R1 is an alkyl group, an olefinic group, an aromatic group, Ph, PhCH2, an O-alkyl group, an O-olefinic group, an O-aromatic group, O-Ph, or O-CH2Ph, and wherein Z is an N-imido group. In particular, P1 may be selected from the group consisting of benzyl, benzyloxymethyl and benzoyl, and Z may be a heterocyclic N-imido group, preferably having 5 to 7 atoms in the ring and alternatively substituted with at least one electron withdrawing group, preferably selected from the group consisting of a chloro group, a fluoro group and a nitro group. In particular, it is contemplated that Z may be succinimido, phthalimido, 5-norbornene-2,3-dicarboxyimido, maleimido and substituted derivatives thereof.
|
