Harnessing Stereospecific <i>Z</i>-Enamides through Silver-Free Cp*Rh(III) Catalysis by Using Isoxazoles as Masked Electrophiles
作者:Suvankar Debbarma、Sourav Sekhar Bera、Modhu Sudan Maji
DOI:10.1021/acs.orglett.8b04130
日期:2019.2.1
The stereospecific synthesis of Z-enamides is described in this paper. For the first time, isoxazoles have been employed as electrophiles in C–H functionalization to afford thermodynamically less stable Z-enamides utilizing salicylaldehydes in an atom- and step-economic fashion. The stereochemistry of enamides might originate from the relative disposition of atoms present in isoxazole and the intramolecular
本文描述了Z-烯酰胺的立体有择合成。首次将异恶唑用作C–H功能化过程中的亲电子试剂,从而以原子经济和分步经济的方式利用水杨醛提供热力学上较不稳定的Z-酰胺。烯酰胺的立体化学可能源自异恶唑中存在的原子的相对位置和分子内氢键。由于多种结构上和电子上不同的水杨醛和异恶唑能有效反应,因此该反应显示出极好的范围。