Investigations of regio- and stereoselectivities in the synthesis of cytotoxic isoxazolidines through 1,3-dipolar cycloadditions of nitrones to dipolarophiles bearing an allylic oxygen
作者:Rajinder Singh、Surinderjit Singh Bhella、A.K. Sexana、M. Shanmugavel、Abdul Faruk、M.P.S. Ishar
DOI:10.1016/j.tet.2006.12.076
日期:2007.3
allylic oxygen, which furnishes substituted-isoxazolidine analogs of the furanose ring of nucleosides, have been investigated. Although the obtained regioselectivities are anticipated, a rationalization of the preferred formation of endo-cycloadducts necessitates the involvement of an allylic oxygen in secondary interaction. The obtained isoxazolidines display cytotoxic activities against a number of human
已经研究了硝酮与带有烯丙基氧的偶极亲和剂的环加成反应中的区域选择性和立体选择性,这提供了核苷呋喃糖环的取代-异恶唑烷类似物。虽然所获得的区域选择性预期,优选形成的合理化内-cycloadducts必要烯丙基氧在次级相互作用的参与。所获得的异恶唑烷显示出对许多人类癌细胞系的细胞毒活性。