AbstractThe investigation of distinctive dipole‐transmissive dipolar cycloaddition (DTDC) methodology and the formalisation of this concept is reported. A DTDC procedure was able to be developed by taking advantage of the structural complementarity of azide and diazoalkane 1,3‐dipoles. Intramolecular azide‐alkene 1,3‐DCs followed by spontaneous dipole transmission upon work‐up furnished intermediate α‐diazoisoindole and α‐diazoisoquinoline substrates bearing the key secondary diazoalkane 1,3‐dipole. N‐Derivatisation of the intermediate α‐diazoisoindole and α‐diazoisoquinolines with a tethered secondary dipolarophile followed by a subsequent 1,3‐DC allowed for rapid construction of a range of functionalised polycyclic N‐heterocycles. Integrated experimental and theoretical studies established requirements for product formation and revealed the likely mechanistic basis of divergent reactivity observed.
摘要 报告了对独特的偶极-传递性偶极环加成(DTDC)方法的研究以及这一概念的正式化。利用叠氮和重氮烷 1,3-偶极的结构互补性,开发了一种 DTDC 程序。分子内叠氮烯 1,3-DC,然后在工作过程中自发地进行偶极传递,产生了带有关键次级重氮烷 1,3-偶极的α-重氮异吲哚和α-重氮异喹啉中间底物。中间体 α-重氮异吲哚和 α-重氮异喹啉与系留的仲双极性化合物发生 N-衍生化反应,随后进行 1,3-DC,从而快速构建出一系列官能化多环 N-杂环。综合实验和理论研究确定了产物形成的要求,并揭示了所观察到的不同反应性的可能机理基础。