Synthesis of 5-Substituted 2-Pyrrolidinones by Coupling of Organozinc Reagents with Cyclic N-Acyliminium Ions
作者:Ivann Zaragoza-Galicia、Zaira A. Santos-Sánchez、Yazmín I. Hidalgo-Mercado、Horacio F. Olivo、Moisés Romero-Ortega
DOI:10.1055/s-0037-1610733
日期:2019.12
coupling reaction between cyclic N-acyliminium ions with organozinc reagents is described. The cyclic N-acyliminium ions, generated in situ from N-substituted-5-hydroxy-2-pyrrolidinones by treatment with boron trifluoride–diethyl ether complex or titanium tetrachloride, are trapped by the organozinc reagent, which is formed from an alkyl bromide in the presence of zinc in the same reaction medium. The
描述了环状N-酰亚胺离子与有机锌试剂之间的偶联反应。通过用三氟化硼-二乙醚络合物或四氯化钛处理,由N-取代的5-羟基-2-吡咯烷酮原位生成的环状N-酰亚胺离子被有机锌试剂截留,该试剂由烷基溴化物形成。在相同的反应介质中存在锌。用这种方法产生的N-取代的5-烯丙基-2-吡咯烷酮作为通用的中间体,用于合成具有吲哚并立定和吡咯并氮杂并吡嗪基核心的氮杂双环系统。