Phorboxazole compounds and methods of their preparation
申请人:The Trustees of the University of Pennsylvania
公开号:US07485631B2
公开(公告)日:2009-02-03
Novel macrolactone compounds, their methods of preparation, pharmaceutical compositions containing these compounds, and methods for their pharmaceutical use are disclosed. In certain embodiments, the macrolactone compounds may be useful, inter alia, for treating various cancers, inducing apoptosis in malignant cells, or inhibiting cancer cell division.
Phorboxazole synthetic studies: design, synthesis and biological evaluation of phorboxazole A and hemi-phorboxazole A related analogues
作者:Amos B. Smith、Anne-Marie L. Hogan、Zhuqing Liu、Thomas M. Razler、Regina M. Meis、Brandon I. Morinaka、Tadeusz F. Molinski
DOI:10.1016/j.tet.2010.12.043
日期:2011.7
evaluation of a new phorboxazole analogue, comprising an acetal replacement for the C-ring tetrahydropyran of the natural product and carrying a potency-enhancing C(45–46) vinyl chloride side chain, is described. In addition, the synthesis of (+)-hemi-phorboxazole A and a series of related hemi-phorboxazole A analogues has been achieved. The new acetal ring replacement analogue displayed activity comparable
描述了一种新的佛波唑类似物的设计、合成和生物学评价,该类似物包含天然产物C环四氢吡喃的缩醛替代物,并带有增强效力的 C(45-46) 氯乙烯侧链。此外,还实现了(+)-半佛盒唑A和一系列相关的半佛盒唑A类似物的合成。新的缩醛环替代类似物显示出与母体天然产物对 HCT-116(结肠)细胞的活性相当(IC 50 2.25 ng/mL)。同样重要的是,佛盒唑类似物和两个相关的半佛盒唑 A 同源物在针对致病性白色念珠菌菌株进行检测时表现出显着的抗真菌活性。
A Second-Generation Total Synthesis of (+)-Phorboxazole A
作者:Amos B. Smith、Thomas M. Razler、Jeffrey P. Ciavarri、Tomoyasu Hirose、Tomoyasu Ishikawa、Regina M. Meis
DOI:10.1021/jo7018152
日期:2008.2.1
A highly convergent second-generation synthesis of (+)-phorboxazole A has been achieved. Highlights of the synthetic approach include improved Petasis-Ferrier union/rearrangement conditions on a scale to assemble multigram quantities of the C(11-15) and C(22-26) cis-tetrahydropyrans inscribed with the phorboxazole architecture, a convenient method to prepare E- and Z-vinyl bromides from TMS-protected alkynes utilizing radical isomerization of Z-vinylsilanes, and a convergent late-stage Stille union to couple a fully elaborated C(1-28) macrocyclic iodide with a C(29-46) oxazole stannane side chain to establish the complete phorboxazole skeleton. The synthesis, achieved with a longest linear sequence of 24 steps, proceeded in 4.6% overall yield.
Synthesis and Biological Evaluation of Phorboxazole Congeners Leading to the Discovery and Preparative-Scale Synthesis of (+)-Chlorophorboxazole A Possessing Picomolar Human Solid Tumor Cell Growth Inhibitory Activity
作者:Amos B. Smith、Thomas M. Razler、Regina M. Meis、George R. Pettit
DOI:10.1021/jo701816h
日期:2008.2.1
Highly convergent syntheses of eight phorboxazole congeners and their evaluation against a diverse panel of human solid tumor cancer cell lines have been achieved. Specifically, the C(45-46) alkyne, alkene, and alkane phorboxazole A analogues [(+)-4-(+)-6] were constructed and found to display single digit nanomolar cell growth inhibitory activities in a series of human cancer cell lines. The structurally simplified C(11-15)-acetal congener (+)-20Z also proved potent albeit reduced (cf. 34.6 nM) when evaluated against the same cell line panel. Importantly, (+)-C(46)-chlorophorboxazole A (3) displayed picomolar (pM) inhibitory activity in several cell lines.
Hemi-Phorboxazole A: Structure Confirmation, Analogue Design and Biological Evaluation
作者:Amos B. Smith、Zhuqing Liu、Anne-Marie L. Hogan、Doralyn S. Dalisay、Tadeusz F. Molinski
DOI:10.1021/ol9014317
日期:2009.8.20
A synthesis providing totally synthetic (+)-hemi-phorboxazole A (1), proceeding in two steps (85% yield) from known vinyl iodide precursor (+)-2, has been achieved in conjunction with the design, synthesis, and biological evaluation of two hemi-phorboxazole analogues [(+)-3 and (-)-4] featuring ring replacements inscribed within the macrolide. Although hemi-phorboxazole A (1) displayed no activity when tested against Candida albicans and two human cancer cell lines, analogue (-)-4 exhibited significant tumor cell growth inhibitory activity in the nanomolar range against HCT-116 (colon) and SK-BR-3 (breast), while (+)-3 displayed promising antifungal activity against C. albicans.