A Diamino Alcohol Catalyzed Enantioselective Crossed Aldol Reaction of Acetaldehyde with Isatins - A Concise Total Synthesis of Antitumor Agents
作者:Ummareddy Venkata Subba Reddy、Madhu Chennapuram、Kento Seki、Chigusa Seki、Bheemreddy Anusha、Eunsang Kwon、Yuko Okuyama、Koji Uwai、Michio Tokiwa、Mitsuhiro Takeshita、Hiroto Nakano
DOI:10.1002/ejoc.201700399
日期:2017.7.17
metal-free total syntheses of antitumor and antiviral agents with the tryptanthrin architecture, that is, phaitanthrin B and cephalanthrin A, along with the biologically active indolidine alkaloids chimonamidine and donaxaridine as well as the formal synthesis of CPC-1. The highly enantioselective outcome of this catalytic crossed aldol reaction was evaluated by calculating the Gibbs free energies of the possible
已使用一系列简单的二氨基醇催化剂开发了靛红衍生物和乙醛的对映选择性交叉羟醛缩合反应,以高化学收率(高达95%)和光学纯度(高达92%)提供了3-取代的3-羟基吲哚-2-酮。 ee)。本方案的合成潜力已通过具有锥虫素结构的抗肿瘤药和抗病毒药的简明,对映体选择性,无保护基团和无过渡金属的总合成得到了证明,这就是类泛素B和脑啡肽A以及具有生物活性的吲哚啶生物碱,mon胺和多那西啶以及CPC-1的正式合成。通过计算可能的过渡态的吉布斯自由能,评估了该催化的交叉羟醛反应的高度对映选择性。