A thermodynamic preference of chiral cis-γ,δ-epimino-(E)-α,β-unsaturated esters over other stereoisomers: Synthetically useful Pd(0)-catalyzed equilibrated reactions of aziridines bearing an α,β-unsaturated ester group
作者:Toshiro Ibuka、Masako Akaji、Norio Mimura、Hiromu Habashita、Kazuo Nakai、Hirokazu Tamamura、Nobutaka Fujii、Yoshinori Yamamoto
DOI:10.1016/0040-4039(96)00403-0
日期:1996.4
A practical synthesis of chiral N-arylsulfonyl-cis-γ,δ-epimino-(E)-α,β-enoates, key intermediates for the synthesis of (E)-alkene dipeptide isosteres via Pd(0)-catalyzed equilibrated reactions, has been successfully achieved by exposing N-arylsulfonyl-γ,δ-epimino-α,β-unsaturated esters to a catalytic amount of Pd(PPh3)4 in THF at 0 ∼ 20 °C.
手性的实用合成Ñ -arylsulfonyl-顺- γ,δ -epimino-(ë) - α,β -enoates,对(合成关键中间体ë) -烯烃电子等排体的二肽通过钯(0)催化的平衡反应,通过将N-芳基磺酰基-γ,δ-表-氨基-α,β-不饱和酯暴露于催化量的Pd(PPh 3)4在THF中的温度为0到20°C,可以成功地实现这一目的。