| 主权项 |
1. A process for preparing a compound of formula (III), or a salt thereof, wherein Z is H or an amino protecting group, comprising reacting a compound of formula (IV), or a salt thereof, wherein each of R substituents is an aldehyde group —CHO; or each of R substituents, being the same or different, is a carboxy group COOH or a reactive derivative thereof, or a —CH2X group, wherein X is an halogen atom or a good leaving group, with a compound of formula (V), or a salt thereof,
NH2—Z (V) wherein Z is as defined above, and, if the case, converting a compound of formula (III) into another compound of formula (III) or a salt thereof, and/or converting a salt of a compound of formula (III) into its free base. |
