The invention is directed to a process of synthesizing compounds of formula (VI):
wherein R
1-
R
9
, R
3′
, R
4′
and Y are as set forth in the specification, and said method is useful for large scale synthesis thereof. The invention is also directed to useful intermediates for synthesizing the compounds of formula (VI) and processes of preparing said intermediates.
本发明涉及一种合成化合物的方法,其
化学式为(VI):其中R1-R9,R3',R4'和Y如规范中所述,该方法适用于大规模合成。本发明还涉及用于合成化合物的有用中间体以及制备该中间体的方法。