作者:Christian Wolf、Max Moskowitz
DOI:10.1021/jo200774e
日期:2011.8.5
A readily available chiral bisoxazolidine catalyzes the asymmetric Reformatsky reaction between ethyl iodoacetate and aldehydes. In the presence of 10 mol % of the ligand, dimethylzinc, and air, this method produces ethyl 3-hydroxy-3-(4-aryl)propanoates in high yields and in 75 to 80% ee at room temperature within 1 h. In contrast to aromatic substrates, relatively low ee’s are obtained with aliphatic
容易获得的手性二恶唑烷催化碘代乙酸乙酯和醛之间的不对称Reformatsky反应。在存在10 mol%的配体,二甲基锌和空气的情况下,该方法在1小时内于室温下以高收率和75-80%ee生成3-羟基-3-(4-芳基)丙酸乙酯。与芳族底物相反,用脂肪族醛获得相对较低的ee。