The α-ester group of N-protected α-amino esters was reduced with diisobutylaluminum hydride to an intermediate aluminoxy acetal that on reaction with a Wittig reagent afforded the title chiral compounds in 48-78% chemical yields.
N-保护的α-
氨基酯的α-酯基团被
二异丁基铝
氢化物还原为中间体铝氧基
缩醛,该中间体与Wittig试剂反应后生成了标题的手性化合物,
化学产率为48-78%。