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
由相应的氮丙啶-2-羧酸酯通过Weinreb's酰胺有效地制备了各种对映体纯的2-酰基氮丙啶,随后进行了有机金属化合物的处理。NaBH4在ZnCl2的存在下,通过NaBH4立体选择性地还原了这些2-acylaziridines的羰基基团,得到具有高非对映选择性和化学收率的赤型1,2-氨基醇。使用这种方法,我们以高收率制备了(1R,2S)-N-Boc-去氧麻黄碱5,N-Boc-红景天醇8,N-Boc-D-赤型-鞘氨醇9和N-Boc-螺旋甜菜碱10。