Process for total synthesis of pladienolide B and pladienolide D
申请人:Kanada Mikie Regina
公开号:US20080021226A1
公开(公告)日:2008-01-24
[Problems to be Solved]
To provide an effective process for total synthesis of pladienolide B and pladienolide D having excellent anti-tumor activity and to provide useful intermediates in the above-described process.
[Measure for Solving the Problem]
A process for producing a compound represented by Formula (11):
wherein P
1
, P
7
, P
8
, P
9
and R
1
are the same as defined below, characterized by including reacting a compound represented by Formula (12):
wherein P
7
means a hydrogen atom or a protecting group for hydroxy group; R
1
means a hydrogen atom or a hydroxy group, with a compound represented by Formula (13):
wherein P
1
means a hydrogen atom or a protecting group for hydroxy group; P
8
means a hydrogen atom, an acetyl group or a protecting group for hydroxy group; P
9
means a hydrogen atom or a protecting group for hydroxy group; or P
8
and P
9
may form together a group represented by a formula:
wherein R
5
means a phenyl group which may have a substituent, in the presence of a catalyst.
PROCESS FOR TOTAL SYNTHESIS OF PLADIENOLIDE B AND PLADIENOLIDE D
申请人:KANADA Regina Mikie
公开号:US20100204490A1
公开(公告)日:2010-08-12
Process for producing compound of Formula:
wherein P
2
, P
3
and R
2
are the same as defined below, characterized by comprising reacting a compound represented by Formula (7):
wherein P
3
means a protecting group for hydroxy group; and Het means a 1-phenyl-1H-tetrazol-5-yl group, with a compound represented by Formula (8):
wherein P
2
means a protecting group for hydroxy group; and R
2
means a phenyl group which may be substituted, in the presence of a base.
A convergent route for the asymmetric totalsynthesis of antibacterial macrolide sorangiolide A has been developed for the first time. The key feature of this synthesis includes Krische iridium-catalyzed anti-diastereoselective carbonyl crotylation, Crimmins acetate aldol, Yamaguchi esterification, Julia–Kocienski olefination, Horner–Wadsworth–Emmons olefination, and ring-closing metathesis. The origin
TOTAL SYNTHESIS OF PLADIENOLIDE B AND PLADIENOLIDE D
申请人:Eisai R&D Management Co., Ltd.
公开号:EP1935893A1
公开(公告)日:2008-06-25
Disclosed is a process for production of a compound represented by the formula (11):
[wherein P1 represents a hydrogen atom or a protective group for a hydroxyl group; P7 represents a hydrogen atom or a protective group for a hydroxyl group; P8 represents a hydrogen atom, an acetyl group or a protective group for a hydroxyl group and P9 represents a hydrogen atom or a protective group for a hydroxyl group, or P8 and P9 may together form a group represented by the formula:
(where R5 represetns a phenyl group which may have a halogen atom; and R1 represetns a hydrogen atom or a hydroxyl group)]. The process comprises the step of reacting a compound represented by the formula (12):
(wherein P7 and R1 are as defined above) with a compound represented by the formula (13):
(wherein P1, P8, P9 and R5 are as defined above) in the presence of a catalyst.