Treatment of chiral oxazolidinone with Bu2BOTf (2.5 equiv.) and Et3N (3.0 equiv.) quantitatively produced the doubly borylated enolate, which afforded the double aldol products with high diastereoselectivity after reaction with aldehydes.
用Bu 2 BOTf(2.5当量)和Et 3 N(3.0当量)处理手性
恶唑烷酮可定量生成双
硼化烯醇酸酯,与醛反应后,该双羟醛酸酯产物具有高非对映选择性。