Synthesis of Pyrrole-Fused <i>C</i>,<i>N</i>-Cyclic Azomethine Imines and Pyrazolopyrrolopyrazines: Analysis of Their Aromaticity Using Nucleus-Independent Chemical Shifts Values
作者:Merve Sinem Özer、Nurettin Menges、Selbi Keskin、Ertan Şahin、Metin Balci
DOI:10.1021/acs.orglett.5b03434
日期:2016.2.5
derivative with various dipolarophiles resulted in the formation of cycloadducts having a pyrazolopyrrolopyrazine skeleton. The aromaticity of C,N-cyclic azomethine imines as well as that of pyrazolopyrrolopyrazines was determined by calculating of nucleus-independent chemical shifts values.
研究了具有N-炔丙基的C-2取代吡咯的AgOTf催化反应。观察到选择性的6 -endo-dig模式的环化,导致形成吡咯稠合的C,N-环偶氮甲亚胺亚胺衍生物。一种偶氮甲亚胺亚胺衍生物与各种双极性亲核剂的反应导致形成具有吡唑并吡咯并吡咯并骨架的环加合物。通过计算不依赖于核的化学位移值,确定C,N-环偶氮甲亚胺的亚胺以及吡唑并吡咯并吡嗪的芳族。