allylic substitution reaction using a commercially available (S)-P-Phos as a ligand, affording optically active dihydropyridones and C-allylated dihydropyridones in high yields and good enantioselectivities with the S-factor up to 43. With this protocol, a catalytic asymmetric total synthesis of indolizidine (−)-209I was realized for the first time.
通过使用市售(S)-P-Phos作为
配体的Pd催化的
烯丙基取代反应实现2-取代的2,3-二
氢-4-
吡啶酮的动力学拆分,提供旋光性的
二氢吡啶酮并进行C-
烯丙基化
二氢吡啶酮具有高收率和良好的对映选择性,S因子高达43。使用该方案,首次实现了
吲哚并立定(-)-209I的催化不对称全合成。