Synthesis of chiral sultams and their application as chiral auxiliaries in an asymmetric Diels–Alder reaction
作者:Hong-Kui Zhang、Wing-Hong Chan、Albert W.M. Lee、Wai-Yeung Wong、Ping-Fang Xia
DOI:10.1016/j.tetasy.2004.12.026
日期:2005.2
A number of bicyclic chiral sultams were synthesized based on 1,3-dipolar cycloaddition reactions of nitrile oxides and nitrones with prop-1-ene-1,3-sultone. The corresponding N-enoyl sultams were prepared by acylation. Their relative effectiveness as new chiral auxiliaries in asymmetric synthesis was evaluated for the asymmetric Diels–Alder reactions with cyclopentadiene. Good chemical yield and excellent
基于腈和硝酮与丙-1-烯-1,3-磺内酯的1,3-偶极环加成反应,合成了许多双环手性阿马酸。通过酰化制备相应的N-烯酰基阿马酸。通过环戊二烯的不对称Diels-Alder反应,评估了它们在不对称合成中作为新手性助剂的相对有效性。观察到良好的化学产率和优异的内选择性。研究了其结构与促进合成手性苏丹麦不对称诱导效果之间的关系。