Facile formation of tetrahydrofurans with multiple chiral centers using double iodoetherification of σ-symmetric diene acetals: short asymmetric total synthesis of rubrenolide and rubrynolide
作者:Hiromichi Fujioka、Yusuke Ohba、Hideki Hirose、Kenji Nakahara、Kenichi Murai、Yasuyuki Kita
DOI:10.1016/j.tet.2008.02.088
日期:2008.5
novel double intramolecular iodoetherification of σ-symmetric diene acetals from (R,R)-hydrobenzoin occurred in highly diastereoselective manners to give tetrahydrofuran moieties with multiple chiral centers in a one-pot operation. The chemoselective discrimination of the two iodomethyl functions in the products was attained in various reactions. The reaction was applied to the concise asymmetric syntheses
从(R,R)-氢安息香素中σ对称二烯乙缩醛的新型双分子碘代醚化反应以高度非对映选择性的方式进行,以一锅操作得到具有多个手性中心的四氢呋喃部分。在各种反应中实现了产物中两个碘甲基官能团的化学选择性鉴别。该反应被用于简单的不对称合成的红花烯内酯和红花内酯,其中手性助剂的单元作为模板来实现化学选择性和作为羟基官能团的保护基。