γ-Acetoxy-α,β-enoates were easily reduced by samarium diiodide (SmI2) in THF to generate samarium dienolates which were kinetically trapped with ease at their α-positions by electrophiles (proton, aldehydes or ketones) to yield (E)-alkene dipeptide isosteres or γ-amino acid derivatives in high chemical yields.
γ-乙酰氧基-α,β-烯酸酯很容易被 THF 中的二
碘化钐 (
SmI2) 还原,生成二烯酸
钐,后者在动力学上很容易被亲电子试剂(质子、醛或酮)捕获在其 α-位置,从而产生 (E )-烯烃二肽电子等排体或γ-
氨基酸衍
生物的
化学产率很高。