Palladium-Catalyzed Double Allylation of Sugar-Imines by Employing Tamaru–Kimura’s Protocol: Access to Unnatural Iminosugars
作者:Annavareddi Naresh、Kanakaraju Marumudi、A. C. Kunwar、Batchu Venkateswara Rao
DOI:10.1021/acs.orglett.7b00441
日期:2017.4.7
pyrrolidine and piperidine iminosugars, respectively, in one pot was developed using Kimura and Tamaru’s procedure, where a Pd salt in the presence of Et2Zn was used for the domino reaction. In this procedure, double allylation, which involves nucleophilic allylation–heterocyclization, took place to give desired nitrogen heterocycles. This strategy was further elaborated to synthesize some unnatural deoxycalystegines
使用Kimura和Tamaru方法在一个锅中分别将乙烯基吡喃糖胺和乙烯基呋喃糖胺分别转化为2,6-和2,5-二取代的吡咯烷和哌啶亚氨基糖,其中使用在Et 2 Zn存在下的Pd盐多米诺骨牌反应。在该程序中,进行了涉及亲核烯丙基化-杂环化的双重烯丙基化,以产生所需的氮杂环。进一步阐述了该策略以合成一些非天然的脱氧花键苷,羟基化的吡咯烷,哌啶和吲哚并立定类似物。