Methods are provided for preparing a compound with a fused ring structure of formula (XIV) which comprises one or more reactions starting from a 21-cyano compound of formula (XVI) where typically; R
1
is an amidomethylene group or an aryloxymethylene group; R
5
and R
8
are independently chosen from —H, —OH or —OCOCH
2
OH, or R
5
and R
8
are both keto and the ring A is a p-benzoquinone ring; R
14a
and R
14b
are both —H ozone is —H and the other is —OH, —OCH
3
or —OCH
2
CH
3
, or R
14a
and R
14b
together form a keto group; and R
15
and R
18
are independently chosen from —H or —OH, or R
5
and R
8
are both keto and the ring A is a p-benzoquinone ring. In modified starting materials, the 21-cyano group can be replaced by other groups introduced using nucleophilic reagents.
Antitumoral analogs of ET-743
申请人:Manzanares Ignacio
公开号:US20080051407A1
公开(公告)日:2008-02-28
Antitumor compounds have the five membered fused ring ecteinascidin structure of the formula (XIV). The present compounds lack a 1,4-bridging group as found in the ecteinascidins. They have at the C-1 position a substituent selected from an optionally protected or derivatised aminomethylene group or an optionally protected or derivatised hydroxymethylene group.