In the presence of molecular sieve (MS) 4 Å in DMF, a catalyst-free aldol condensation of a variety of aromatic and aliphatic ketones with isatins under mild reaction conditions has been developed. This approach may provide access to a wide range of 3-substituted-3-hydroxyindolin-2-ones in good to excellent yields.
                                    在
DMF中存在4 Å
分子筛(MS)的情况下,已经开发出一种无需催化剂的醛酮缩合反应,可以在温和条件下使多种芳香和脂肪酮与
靛红反应。这种方法可能提供了一条途径,以良好至优异的产率合成广泛的3-取代-3-羟基
吲哚-2-酮。