Synthesis of a 35-member stereoisomer library of bistramide A: evaluation of effects on actin state, cell cycle and tumor cell growth.

Synthesis of a 35-member stereoisomer library of bistramide A: evaluation of effects on actin state, cell cycle and tumor cell growth.
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DOI:
10.1021/jo802269q
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发表时间:
2009-03-06
期刊:
The Journal of organic chemistry
影响因子:
--
通讯作者:
Panek JS
Panek JS
中科院分区:
其他
文献类型:
--
作者:
Wrona IE;Lowe JT;Turbyville TJ;Johnson TR;Beignet J;Beutler JA;Panek JS

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Synthesis and preliminary biological evaluation of a 35-member library of bistramide A stereoisomers are reported. All eight stereoisomers of the C1-C13 tetrahydropyran fragment of the molecule were prepared utilizing crotylsilane reagents 9 and 10 in our [4+2]-annulation methodology. In addition, the four isomers of the C14-C18 γ-amino acid unit were accessed via a Lewis acid mediated crotylation reaction using both enantiomers of organosilane 11. The spiroketal subunit of bistramide A was modified at the C39-alcohol to give another point of stereochemical diversification. The fragments were coupled using standard peptide coupling protocol to provide 35 stereoisomers of the natural product. These stereochemical analogs were screened for their effects on cellular actin and cytotoxicity against cancer cell lines (UO-31 renal and SF-295 CNS). The results of these assays identified one analog, 1.21, with enhanced potency relative to the natural product, bistramide A.
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