The present invention provides a class of fulvestrant ester derivatives and preparation method thereof. Such a compound is an aliphatic ester formed by esterifying the —OH at positions C-3 and C-17 of fulvestrant, having a structure of the following formula:
In the formula, substituent R is H, alkanoyl or alkenoyl having 2 to 22 carbon atoms or stereoisomers thereof; substituent R′ can be H, alkanoyl or alkenoyl having 2 to 4 carbon atoms or stereoisomers thereof; such an aliphatic ester compound being used as a pro-drug can improve the stability of a compound, meanwhile the decrease of polarity can enable them to be easily made into preparations like lipid emulsion, microsphere etc., and avoid the degradation of the compound caused by factors like high temperature etc. and the use of an organic solution during preparation process.
本发明提供了一类富维司特
酮酯衍
生物及其制备方法。这种化合物是通过对富维司特酮的C-3和C-17位置的—OH进行酯化形成的脂肪酯,具有以下结构式:在该式中,取代基R为H,具有2至22个碳原子的烷酰基或烯酰基,或其立体异构体;取代基R′可以是H,具有2至4个碳原子的烷酰基或烯酰基,或其立体异构体;这种脂肪酯化合物作为一种前药可以提高化合物的稳定性,同时降低极性可以使它们更容易制成脂质乳剂、微球等制剂,并避免由高温等因素引起的化合物降解以及在制备过程中使用有机溶液。