An Inverse Electron Demand Azo-Diels–Alder Reaction of <i>o</i>-Quinone Methides and Imino Ethers: Synthesis of Benzocondensed 1,3-Oxazines
作者:Dmitry V. Osipov、Vitaly A. Osyanin、Guzel’ D. Khaysanova、Elvira R. Masterova、Pavel E. Krasnikov、Yuri N. Klimochkin
DOI:10.1021/acs.joc.8b00692
日期:2018.4.20
the reactions of o-quinone methide precursors with imino ethers. The reaction provides a versatile route to substituted 1,3-benzoxazines. The proposed reaction mechanism involves the generation of the o-quinone methide intermediates, imino-Diels–Alder reaction, and elimination. This cascade process is a rare example of the participation of imino ethers as dienophiles.
我们已经研究了邻醌甲基化物前体与亚氨基醚的反应。该反应提供了取代的1,3-苯并恶嗪的通用途径。拟议的反应机制涉及邻醌甲基化物中间体的产生,亚氨基-狄尔斯-阿尔德反应和消除。这种级联过程是亚氨基醚作为亲双烯体参与的罕见例子。