De Novo Asymmetric Syntheses of Muricatacin and Its Analogues via Dihydroxylation of Dienoates
摘要:
A short and highly efficient route to both enantiomers of muricatacin as well as the C-5-epimer has been developed. The key to the overall transformation is the highly regio- and enantioselective Sharpless asymmetric dihydroxylation of an (E,Z)-dienoate. The highly efficient stereoselective synthesis prepares (-)-muricatacin in seven steps and 66% overall yield.
PCC-mediated novel oxidation reactions of homobenzylic and homoallylic alcohols
作者:Rodney A. Fernandes、Pradeep Kumar
DOI:10.1016/s0040-4039(02)02784-3
日期:2003.2
carboncarbon bond cleavage reaction during oxidation of homobenzylic alcohols leading to the formation of benzylic carbonyl compounds has been observed. Homobenzylic alcohols with no benzylic substitution (R1=H) gave benzylic aldehydes without further oxidation, while those with benzylic substitution (R1=Me, Et, Ar) gave benzylic ketones. In contrast, homoallylicalcohols gave products arising from double bond
Identification of Chiral Alkenyl- and Alkynylcarbinols as Pharmacophores for Potent Cytotoxicity
作者:Dounia El Arfaoui、Dymytrii Listunov、Isabelle Fabing、Mohamed Oukessou、Céline Frongia、Valérie Lobjois、Arnaud Samson、Frédéric Ausseil、Abdeslem Ben-Tama、El Mestafa El Hadrami、Remi Chauvin、Yves Génisson
DOI:10.1002/cmdc.201300230
日期:2013.11
derived from the naturally occurring (S,E)‐icos‐4‐en‐1‐yn‐3‐ol allowed the discovery of a series of 3R‐like 1,4‐di‐unsaturated carbinol units with a significant and systematic enantiomeric effect on cytotoxicity.
In the present work, 103 novel acyclic nucleosides were designed, synthesized, and evaluated for their anticancer activities in vitro and in vivo. The structure–activity relationship (SAR) studies revealed that most target compounds inhibited the growth of colon cancer cells in vitro, of which 3-(6-chloro-9H-purin-9-yl)dodecan-1-ol (9b) exhibited the most potent effect against the HCT-116 and SW480
在目前的工作中,设计、合成了 103 种新型无环核苷,并评估了它们的体外和体内抗癌活性。构效关系(SAR)研究表明,大多数目标化合物在体外均能抑制结肠癌细胞的生长,其中3-(6-氯-9 H -purin-9-yl)dodecan-1-ol ( 9b )对 HCT-116 和 SW480 细胞表现出最有效的作用,IC 50值分别为 0.89 和 1.15 μM。此外,所有( R )-构型的无环核苷衍生物与其( S )-对应物相比都表现出更有效的抗癌活性。机理研究表明,化合物9b通过线粒体膜去极化引发癌细胞系凋亡,并有效抑制集落形成。重要的是,化合物9b可抑制小鼠模型中 SW480 异种移植物的生长,且全身毒性较低。这些结果表明,无环核苷化合物可作为强效且有效的抗癌药物,而化合物9b可能作为一种有前途的先导化合物,在未来的抗癌药物发现中值得进一步关注。
Ailanthone derivatives
申请人:SUNTORY LIMITED
公开号:EP0080570A2
公开(公告)日:1983-06-08
Novel antineoplastic ailanthone derivatives (IIb) represented by the following formula wherein R2 is C5-C18 α, β-unsaturated acyl group and its related compounds are disclosed.
Particularly, some of the above compounds are far more effective than mitomycin C against mouse lymphocytic leucemia p388.
These compound can be synthesized from known ailanthone via important intermediates, triacyloxy ailanthone, represented by the formula:
wherein R, is acyl group.