INTERMEDIATE AND PROCESS OF PREPARATION OF ECTEINASCIDIN SUCH AS ECTEINASCIDINES-583, 597 USING SUCH INTERMEDIATE .
Publication number: WO2007045686
Publication date: 2007-04-26
Inventor: ZHU JIEPING (FR); BOIS-CHOUSSY MICHELE (FR); CHEN JINCHUN (FR); CHEN XIAOCHUAN (FR)
Applicant: CENTRE NAT RECH SCIENT (FR); ZHU JIEPING (FR); BOIS-CHOUSSY MICHELE (FR); CHEN JINCHUN (FR); CHEN XIAOCHUAN (FR)
Classification:
- international:
- European:
Application number: WO2006EP67611 20061020
Priority number(s): US20050728295P 20051020; EP20050292203 20051020
Abstract of WO2007045686
The present invention concerns an intermediate of the following formula (I) in which R1 and R2 represent independently of each other a C1-C12 alkyl group, a (C1-C12 alkoxy)carbonyl group, optionally substituted by one, two or three halogen atom, a (C2-C12 alkenyloxy) carbonyl group, an acyl group, a aryl(C1-C12)alkyl group, an arylalkoxy carbonyl group, a (C1-C12 alkyl)sulfonyl group or an arylsulfonyl group, R3 represents a O-protecting group, R4 and R5 represent independent ly of each other a hydrogen atom or a O-protecting group, R6 represent a O-protecting group and R7 represent a C1-C12 alkyl group or -OR6 and -OR7 form together a group -OCH2O-. The present invention concerns also a process of preparation of the intermediate and its use for the preparation of Ecteinascidin 743 and Ecteinascidin-770.