IMMH001, which is a prodrug for sphingosine-1-phosphate receptor 1 (S1P1) agonist, is converted to the active form, its monophosphate ester (S)-IMMH001-P, by sphingosine kinase 1 (SphK1) and sphingosine kinase 2 (SphK2) in vivo. In this study, we designed head-piece-modified analogues of IMMH001 based on structural information and prepared them with an efficient modular synthetic strategy. The analogues
Stereoselective Intramolecular [4 + 3] Cycloadditions of Nitrogen-Stabilized Chiral Oxyallyl Cations via Epoxidation of N-Tethered Allenamides
作者:Hui Xiong、Jian Huang、Sunil K. Ghosh、Richard P. Hsung
DOI:10.1021/ja030416n
日期:2003.10.1
first intramolecular [4 + 3] cycloaddition reaction using nitrogen-stabilized chiral oxyallylcations that are tethered to furan or diene through the nitrogen atom is described here. Formation of these nitrogen-stabilized chiral oxyallylcations is achieved by a chemoselective epoxidation of chiral allenamides via syringe pump addition of dimethyl dioxirane. The ensuing cycloaddition can be carried out
[EN] SPHINGOLIPID DERIVATIVES AND THE COMPOSITION FOR ANTI-CANCER CONTAINING THE SAME<br/>[FR] DERIVES DE SPHINGOLIPIDES ET COMPOSITION ANTICANCEREUSE CONTENANT LESDITS DERIVES
申请人:DOOSAN CORP
公开号:WO2006004359A1
公开(公告)日:2006-01-12
Disclosed are a novel sphingolipid derivative having a sphingosine kinase suppressing activity and a composition containing the same. When the newly synthesized sphingolipid derivative of the invention is used, it is possible to maintain concentrations of ceramide and sphingosine to be high by preventing ceramide and sphingosine from being phosphorylated due to sphingosine kinase since an activity of sphingosine kinase is suppressed. In addition, since the apoptosis is induced in a cancer cell by ceramide and sphingosine, it is possible to treat or prevent a cancer or disease related to the cancer. Further, it is possible to treat or prevent a hyper- proliferative disease such as cancer or proliferation-promoting activity of sphingosine kinase. Accordingly, the composition containing the same can be used as a composition for suppressing sphingosine kinase and a composition for treating or preventing a cancer or hyper-proliferative disease.
Regio- and stereoselective hydroborations of chiral allyl amines. Synthesis of amino alcohols
作者:Mukund P. Sibi、Biqin Li
DOI:10.1016/s0040-4039(00)74666-1
日期:1992.7
Chiral allyl amines with the carboncarbon double bond at an internal position undergo regio- and stereocontrolled hydroborations to provide 1,2-amino alcohols in good yields. The precursor olefins are readily available from a nucleophilic alaninol synthon prepared from serine.
A new nucleophilic alaninol synthon derived from serine is reported. The utility of this reagent in the stereoselective synthesis of beta,gamma-unsaturated amino alcohols is described.