Efficient Synthesis of Enantiomerically Pure 2-Acylaziridines: Facile Syntheses of <i>N</i>-Boc-safingol, <i>N</i>-Boc-<scp>d</scp><i>-erythro</i>-sphinganine, and <i>N</i>-Boc-spisulosine from a Common Intermediate
作者:Jung Min Yun、Tae Bo Sim、Heung Sik Hahm、Won Koo Lee、Hyun-Joon Ha
DOI:10.1021/jo034755a
日期:2003.10.1
Various enantiomerically pure 2-acylaziridines were prepared efficiently from the corresponding aziridine-2-carboxylate via Weinreb's amide and the subsequent treatment of organometallic compounds. The carbonyl group of those 2-acylaziridines was stereoselectively reduced by NaBH4in the presence of ZnCl2 to give erythro-1,2-amino alcohols with high diastereoselectivities and chemical yields. Using
Constrained ceramide analogs were designed and synthesized by binding terminal alcohol and amine of ceramide with additional carbonyl functional group as 3-acetyl (3), 3-propionyl (4), 3-benzoyl (5), and 3-hexadecanoyl-4-(1-hydroxyhexadec-2-enyl)-oxazolidin-2-ones (6). Compounds 4 and 5 showed potent antileukemicactivities against human leukemia HL-60 cells with good correlation between cell death
3,4-Disubstituted oxazolidin-2-ones as constrained ceramide analogs with anticancer activities
作者:Alok Singh、Hyun-Joon Ha、Jungchan Park、Jun Hee Kim、Won Koo Lee
DOI:10.1016/j.bmc.2011.09.022
日期:2011.11
Heterocyclic analogs of ceramide as 3-alkanoyl or benzoyl-4-(1-hydroxy-2-enyl)-oxazolidin-2-ones were designed by binding of primary alcohol and amide in sphinogosine backbone as a carbamate. They were synthesized by addition of acyl halide to the common ring 4-(1-t-butyldimethylsilyloxyhexadec-2-enyl)-oxazolidin-2-one which was elaborated from chiral aziridine-2-carboxylate including stereoselective