The present inventors have developed a key intermediate for the production of C2 substituted PBDs, which has a leaving group at the C2 position, a carbamate protecting group at the N10 position and a protected hydroxy group at the C11 position. In a first aspect, the present invention comprises a compound with a the formula (I), wherein: R
10
is a carbamate-based nitrogen protecting group; R
11
is an oxygen protecting group; and R
2
is a labile leaving group. In a further aspect, the present invention comprises a method of synthesising a compound of formula (III), or a solvate thereof, from a compound of formula (I) as defined in the first aspect, R
16
is either O—R11, wherein R
11
is as defined in the first aspect, or OH, or R
10
and R
16
together form a double bond between N10 and C11; and R
15
is R. The other substituents are defined in the claims. Further aspects of the present invention relate to compounds of formula (III) (including solvates thereof when R
10
and R
16
form a double bond between N10 and C11, and pharmaceutical salts thereof), pharmaceutical compositions comprising these, and their use in the manufacture of a medicament for the treatment of a proliferative disease.
本发明的发明人开发了一种用于生产C2取代
PBD的关键中间体,该中间体在C2位置具有离去基团,在N10位置具有
氨基甲酸酯保护基团,在C11位置具有保护羟基。在第一个方面,本发明涉及一种具有式(I)的化合物,其中:R10是基于
氨基甲酸酯的氮保护基团;R11是氧保护基团;R2是易离基团。在进一步方面,本发明涉及一种从式(I)的化合物中合成式(III)的化合物或其溶剂化物的方法,其中R16是O-R11,其中R11如第一个方面中所定义,或者是OH,或者是R10和R16共同形成N10和C11之间的双键;R15是R。其他取代基在权利要求中定义。本发明的其他方面涉及式(III)的化合物(包括当R10和R16形成N10和C11之间的双键及其药物盐时的溶剂化物),包含这些的药物组合物,并将其用于制造用于治疗增生性疾病的药物。