The design, inspired by the core-structure of oxicam has allowed the enantioselective synthesis of benzopyranothiazinone motifs employing N-heterocyclic carbene (NHC) catalysis. The NHC-mediated transformation involves the reaction of α,β-unsaturated aldehydes with suitable substituted benzothiazinone derivatives. This process encompasses the initial formation of α,β-unsaturated acylazoliums from ynals
该设计受奥昔康核心结构的启发,允许采用 N-杂环卡宾 (NHC) 催化对映选择性合成苯并
吡喃
噻嗪酮基序。 NHC 介导的转化涉及 α,β-不饱和醛与合适的取代苯并
噻嗪酮衍
生物的反应。该过程包括从炔醛初始形成 α,β-不饱和酰唑鎓,同时从苯并
噻嗪酮生成烯醇化物。这些反应的最终结果是有效的环化,产生具有合理产率和高立体选择性的所需产物。这项研究强调了 NHC 催化在简化复杂杂环结构合成中的潜力。