A series of α-substituted amides 3 and 7–9 has been synthesized in enantiomerically pure form by diastereoselective alkylation of N-alkyl phenylglycinol amides 2 and 4–6 respectively. A rigid amide enolate has been postulated to explain the observed diastereoselectivity.
通过对映体纯净的形式分别通过N-烷基苯基甘
氨醇酰胺2和4-6的非对映选择性烷基化合成了一系列α-取代的酰胺3和7-9。已假定使用刚性酰胺烯酸酯来解释观察到的非对映选择性。