Pateamine A 是一种从海海绵Mycale hentscheli中提取的天然代谢物。它对癌细胞系表现出强大的细胞毒性,并已显示通过抑制真核起始因子 4A 蛋白的功能来靶向蛋白质翻译起始。我们合成了一种简化的 pateamine A 类似物,由天然产物的骨架核心组成,但噻唑杂环被三唑取代。该合成的收敛设计以碱诱导的 δ-戊内酯开放以进入Z、E -二烯酸酯部分、Julia-Kocienski 烯化和铜催化的叠氮化物-炔烃环加成为特征。简化的 pateamine A 类似物的生物活性测试 ( 3) 表明与天然 pateamine A 相比,细胞毒性显着降低。我们认为这种降低的活性主要是由于噻唑取代了三唑杂环。这支持了这样的假设,即 pateamine A 的噻唑对于与其生物靶点的结合很重要。
[EN] BIPOLAR TRANS CAROTENOID SALTS AND THEIR USES<br/>[FR] SELS DE CAROTENOIDES TRANS BIPOLAIRES ET LEURS UTILISATIONS
申请人:DIFFUSION PHARMACEUTICALS LLC
公开号:WO2005028411A1
公开(公告)日:2005-03-31
The invention relates to trans carotenoid salt compounds, methods for making them, methods for solubilizing them and uses thereof. These compounds are useful in improving diffusivity of oxygen between red blood cells and body tissues in mammals including humans.
The invention relates to trans carotenoid salt compounds, methods for making them, methods for solubilizing them and uses thereof. These compounds are useful in improving diffusivity of oxygen between red blood cells and body tissues in mammals including humans.
The invention relates to trans carotenoid salt compounds, methods for making them, methods for solubilizing them and uses thereof. These compounds are useful in improving diffusivity of oxygen between red blood cells and body tissues in mammals including humans.
Allylic stereocenter directed asymmetric conjugate addition of cuprates in the presence of trimethylchlorosilane. enantioselective synthesis of 2-alkyl-4-benzyioxybutanal and 2-alkyl-4-oxopentanal
作者:Silvia Cardani、Giovanni Poli、Carlo Scolastico、Roberto Villa
DOI:10.1016/s0040-4020(01)81451-4
日期:1988.1
Cuprate reagents in the presence of trimethylchlorosilane add with excellent Tr-face selectivity and yield to α,β-unsafcurated ketone and aldehyde bearing In γ-position a masked aldehyde represented by the C-2 of a norephedrine-derlved oxazolidine. The title compounds are obtained in high enantlomeric excess after removal of the chiral auxiliary and of the protective group.