for the diastereoselective preparation of 4- and 4,5-substituted oxazolidinones from Morita–Baylis–Hillman adducts. The strategy is based on an intramolecular cyclization involving a nucleophilic attack of an alkoxide ion to the carbonyl group of a carbamate. The latter is prepared from a Curtius rearrangement having Morita–Baylis–Hillman adduct as substrate. The oxazolidinones were prepared in six
我们在此公开了一种从 Morita-Baylis-Hillman 加合物非对映选择性制备 4- 和 4,5- 取代的
恶唑烷酮的新策略。该策略基于涉及醇盐离子对
氨基甲酸酯羰基的亲核攻击的分子内环化。后者由以 Morita-Baylis-Hillman 加合物为底物的 Curtius 重排制备。
恶唑烷酮分六步制备,总收率分别为 18% 和 49%。