Disclosed is a compound of formula (1), or a pharmaceutically acceptable salt thereof, where R1, R2, R3, R4, R5, R6, R7, R7', R8, R9, R10, R11, R12 and R13 are as disclosed herein. Also, disclosed is a process for the preparation of the compound of formula 1, or a pharmaceutically acceptable salt thereof, and5 intermediates used therein. The compound of formula (1) can be used in the preparation of halichondrin analogs, such as Eribulin; and a process for its preparation from the compound of formula (1) is also disclosed.
本发明涉及一种式(1)的化合物,或其药学上可接受的盐,其中R1、R2、R3、R4、R5、R6、R7、R7'、R8、R9、R10、R11、R12和R13如本文所述。此外,本发明还涉及一种制备式(1)的化合物或其药学上可接受的盐的方法,以及所使用的中间体。式(1)的化合物可用于制备半乳
糖类似物,如依立必利;本发明还公开了从式(1)的化合物制备依立必利的方法。