A Novel Synthesis of 5-Functionalized Oxazolidin-2-ones from Enantiomerically Pure 2-Substituted <i>N</i>-[(<i>R</i>)-(+)-α-Methylbenzyl]aziridines
作者:Tae Bo Sim、Se Hun Kang、Kun Su Lee、Won Koo Lee、Hoseop Yun、Yongkwan Dong、Hyun-Joon Ha
DOI:10.1021/jo0261911
日期:2003.1.1
5-Funtionalized enantiomerically pure oxazolidin-2-ones were prepared in one pot from commercially available chiral aziridines bearing an electron-withdrawing group at C-2 with retention of the configuration in high yields by regioselective aziridine ring-opening followed by intramolecular cyclization.
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