[2,3]-Wittig Rearrangement of Enantiomerically Enriched 3-Substituted 1-Propenyloxy-1-phenyl-2-propen-1-yl Carbanions: Effect of Heteroatoms and Conjugating Groups on Planarization of an α-Oxy-Benzylcarbanion through a Double Bond
作者:Michiko Sasaki、Hidaka Ikemoto、Masatoshi Kawahata、Kentaro Yamaguchi、Kei Takeda
DOI:10.1002/chem.200802322
日期:2009.4.27
Don't get trapped: The effect of conjugating electron‐withdrawing groups and α‐anion‐stabilizing heteroatom substituents on configurational stability of chiral carbanions through a double bond was examined on the basis of extent of chirality transfer in intramolecular trapping in [2,3]‐Wittig rearrangement of chiral 3‐substituted 1‐propenyloxy‐1‐phenyl‐2‐propen‐1‐yl carbanions (see scheme).
不要被束缚:在[2,3]中,通过分子内俘获的手性转移程度,研究了结合吸电子基团和稳定α-阴离子的杂原子取代基通过双键对手性碳负离子构型稳定性的影响。 ]-手性3-取代的1-丙烯氧基-1-苯基-2-丙烯酰基-1-碳负离子的Wittig重排(参见方案)。