Efficient strategy for the iterative synthesis of trans-fused polycyclic ether via SmI2-induced reductive intramolecular cyclization
作者:Nobuyuki Hori、Hiroko Matsukura、Goh Matsuo、Tadashi Nakata
DOI:10.1016/s0040-4020(02)00042-x
日期:2002.3
A highly efficient strategy for the iterative synthesis of a trans-fused polycyclic ether ring system has been developed. The new iterative method involves SmI2-induced reductive intramolecular cyclization of an aldehyde and a β-alkoxy acrylate as the key step, producing a 2,3-trans-tetrahydropyran or oxepane ring. The syntheses of trans-fused 6,6,6-tricyclic, 6,7,6-tricyclic, and 6,7,7,6-tetracyclic
已经开发出用于反式稠合多环醚环系统的迭代合成的高效策略。新的迭代方法涉及作为关键步骤的SmI 2诱导的醛和β-烷氧基丙烯酸酯的还原性分子内环化,生成2,3-反式-四氢吡喃或氧杂环丁烷环。基于新开发的方法,可以有效地实现反式稠合的6,6,6-三环醚,6,7,6-三环醚和6,7,7,6-四环醚的合成。