Certain substituted polyketides, pharmac eutical compositions containing them and their use in treating tumors
申请人:——
公开号:US20030153601A1
公开(公告)日:2003-08-14
The present invention relates to certain substituted polyketides of formula I,
1
wherein A, B and C are as defined herein, pharmaceutical compositions containing said compounds, and the use of said compounds in treating tumors.
bioinsipred gold‐catalyzed tandem Diels–Alder/Diels–Alderreaction of an enynal and a 1,3‐diene, forming the highly‐strained benzotricyclo[3.2.1.02,7]octane skeleton, was reported. In contrast, a Diels–Alder/Friedel–Crafts tandem reaction occurred instead when silver salts were used as the catalyst. Although both reactions experienced the similar Diels–Alderreaction of a pyrylium intermediate with a
A practical and stereoselectivesynthesis of the C(9)–C(24) subunit of (+)‐discodermolide has been achieved. The strategy featured the construction of the key intermediate Z‐trisubstituted vinyl iodide 12 from the dibromo‐olefin 6 via an efficient modified Tanino‐Miyashita's approach. The union of the two fragments was carried out through a Suzuki cross‐coupling reaction.
Total Synthesis of Branimycin: An Evolutionary Approach
作者:Valentin S. Enev、Wolfgang Felzmann、Alexey Gromov、Stefan Marchart、Johann Mulzer
DOI:10.1002/chem.201200257
日期:2012.7.27
The first totalsynthesis of the macrolactone antibioticbranimycin (4) has been described. The key disconnection leads to a cis‐dehydrodecalone core and a polyketide side chain which are connected via organometallic addition. The dehydrodecalone core was targeted via altogether five different approaches featuring various kinds of chiral elements and ring‐closing methodology. In the end the most successful
Total Synthesis of (−)-Spirangien A, an Antimitotic Polyketide Isolated from the Myxobacterium<i>Sorangium Cellulosum</i>
作者:Ian Paterson、Alison D. Findlay、Christian Noti
DOI:10.1002/asia.200800445
日期:2009.4.6
A stereocontrolled total synthesis of the cytotoxic spiroacetal‐containing polyketide (−)‐spirangien A is described. This utilizes an aldol‐based strategy to construct a common stereotetrad intermediate that was elaborated into the spiroacetal core, followed by the introduction of the unstable pentaene‐containing side chain, performed with exclusion of light, using sequential Stille cross‐coupling