Stereo- and regioselective synthesis of novel β-lactam tethered spiropyrrolizidine/pyrrolothiazole heterocyclic hybrids
作者:Rajesh Raju、Raghavachary Raghunathan、Natarajan Arumugam、Abdulrahman I. Almansour、Raju Suresh Kumar、Saied M. Soliman
DOI:10.1016/j.tet.2021.132026
日期:2021.3
A regio and diastereoselective synthesis of library of structurally intriguing novel hybrid heterocycles comprising spiropyrrolizidines/pyrrolothiazoles, oxindole/acenaphthenone and β-lactam moieties have been synthesized in good yields. The hitherto unexplored 2-((1-(4-methoxyphenyl)-4-oxo-3-phenylazetidin-2-yl)methylene) malononitriles were used as the dipolarophiles, while the dipoles were derived
区域 并以高收率合成了结构吸引人的新型杂合杂环文库的非对映选择性合成,所述杂合杂环包括螺吡咯并吡啶/吡咯并噻唑,羟吲哚/ ac啶酮和β-内酰胺部分。迄今未开发的2-(((1-(4-甲氧基苯基)-4-氧代-3-苯基氮杂环丁烷-2-基)亚甲基)丙二腈被用作偶极亲子,而偶极子是从吲哚啉-2,3-原位衍生的。二酮/ ac萘醌和L-脯氨酸/取代的2-芳基-噻唑烷-4-羧酸。该转化的关键步骤是1,3-偶极环加成反应,其中涉及上述组分,可轻松进入生物学相关类别的螺杂环杂种。