Enantioselective synthesis of (−)-cytoxazone and (+)-epi-cytoxazone via Rh-catalyzed diastereoselective oxidative C–H aminations
作者:Srinivasarao V. Narina、Talluri Siva Kumar、Shyla George、Arumugam Sudalai
DOI:10.1016/j.tetlet.2006.11.016
日期:2007.1
An efficient enantioselective synthesis of (−)-cytoxazone (1) and (+)-epi-cytoxazone (2) using proline-catalyzed asymmetric α-amino-oxylation of aldehydes followed by Rh-catalyzed diastereoselective oxidative C–H amination as the key steps is described. syn or anti 1,2-aminoalcohols were obtained by Rh-catalyzed intramolecular amidation of the C–H bonds of carbamates or sulfamate esters with good to
有效的对映选择性合成(-)-cytoxazone(1)和(+)- epi- cytoxazone(2)的方法是脯氨酸催化醛的不对称α-氨基氧化,然后Rh催化非对映选择性氧化C–H胺化描述步骤。通过对氨基甲酸酯或氨基磺酸酯的C–H键进行Rh催化的分子内酰胺化,可获得具有良好或优异的非对映选择性的顺式或反式1,2-氨基醇。