Oxazolidine Sulfur Ylides Derived from Phenylglycinol for the Specific and Highly Diastereoselective Synthesis of Aryl and Alkyl<i>trans</i>-Epoxyamides
作者:Paola G. Gordillo、David M. Aparicio、Marcos Flores、Angel Mendoza、Laura Orea、Jorge R. Juárez、Gabriela Huelgas、Dino Gnecco、Joel L. Terán
DOI:10.1002/ejoc.201300732
日期:2013.9
Aryl and alkyl chiral oxazolidine sulfonium salts with cis and trans dispositions derived from (–)-(R)-2-phenylglycinol were demonstrated to be good to excellent chiral auxiliaries for the diastereoselective synthesis of (2R,3S)-trans-epoxyamides. Interestingly, the diastereoselective outcome depends on the stereochemistry of the chiral center at the C-4 position of the oxazole moiety. The stereoselectivities
具有顺式和反式配置的芳基和烷基手性恶唑烷锍盐被证明是用于非对映选择性合成 (2R,3S)-反式环氧酰胺的优良手性助剂。有趣的是,非对映选择性结果取决于恶唑部分 C-4 位手性中心的立体化学。即使对于脂肪族醛,立体选择性也是一致的。