The present invention relates to a method for the preparation of a compound of formula (I) or pharmaceutically acceptable salts thereof and intermediates thereof, comprising the steps of: a) halogenating a compound of formula (II), resulting in compound of formula (IIa), b) reacting a compound of formula (IIa) at its 14 position with the thiol moiety of a peptide of formula (III), optionally in the presence of a suitable linker, to obtain said compound of formula (I), wherein R
1
represents OH, NH
2
or NH-peptide; R
2
represents H or —CO-peptide; R
3
represents OCH
3
, OH or H; R
4
represents H, or COCF
3
; R
5
represents OH, O-tetrahydropyranyl or H; R
6
represents OH or H; R
7
represents H, OH, OCO(CH
2
)
3
CH
3
or OCOCH(OC
2
H
5
)
2
; R
8
represents OH or H; R
9
represents OH or H; R
10
represents a halogen and L is an optional suitable linker arm.
本发明涉及一种制备式(I)化合物或其药学上可接受的盐及其中间体的方法,包括以下步骤:a) 卤化式(II)化合物,得到式(IIa)化合物;b) 使式(IIa)化合物在其14位与式(III)肽的
硫醇分子反应,可选择在有合适连接剂存在的情况下进行,得到所述式(I)化合物,其中R
1
代表 OH、NH
2
或 NH 肽
2
代表 H 或-CO-肽;R
3
代表 OCH
3
、OH 或 H;R
4
代表 H 或 COCF
3
; R
5
代表 OH、O-
四氢吡喃基或 H; R
6
代表 OH 或 H
7
代表 H、OH、OCO(CH
2
)
3
CH
3
或 OCOCH(OC
2
H
5
)
2
; R
8
代表 OH 或 H; R
9
代表 OH 或 H
10
代表卤素,L 是可选的合适连接臂。