申请人:ZYGMUNT Jan
公开号:US20120077871A1
公开(公告)日:2012-03-29
Provided herein are compounds, compositions containing the compounds, and methods for the treatment of cancer in a cancer patient. In particular, the compounds are made by a process comprising treating a first compound represented by either Formula G′ or Formula M′:
with a second compound of generalized formula R
8
R
9
C(OCH
3
)
2
and an acid selected from the group consisting of camphor sulfonic acid (CSA), p-toluene sulfonic acid (PTSA), hydrochloric acid (HCl) and acetic acid (AcOH), wherein R
1
and R
2
are each selected from H, an alkyl group, an olefinic group, an aromatic group, an O-alkyl group, an O-olefinic group, or an O-aromatic group; R
7
is an alkyl group, an olefinic group, or an aromatic group; P
1
is a hydroxyl protecting group; P
5
is H or an acid labile protecting group at the 7-O position; R
8
is H, alkyl group, olefinic or aromatic group; and R
9
is: H, alkyl group, olefinic or aromatic or is as defined in the specification.