Tetrazines react with OCP⁻¹ through a reverse electron demand Diels–Alder process to produce 3,6-disubstituted-1,2,4-diazaphosphinin-5-olates. DFT calculations reveal that both Diels–Alder and subsequent aromatization barriers are low for both EWG and ED tetrazine substituents. The structure of the solid sodium salt shows the interaction of Na⁺ with aryloxide and also both nitrogens of a neighboring anion, leading to coordination polymer character. 1,2,4-Diazaphosphinin-5-olates react as nucleophiles towards MeI and R₃SiCl, respectively, and were installed on the (Ph₃P)₂Ru(CO)H fragment to investigate their properties as ligands.

中文翻译：

---

N / P“负载”杂芳烃的耐取代基合成方法†

川azine嗪通过反电子需求Diels–Alder工艺与OCP ^-1反应，生成3,6-二取代-1,2,4-二氮杂膦-5酸酯。DFT计算表明，对于EWG和ED四嗪取代基，Diels–Alder和随后的芳构化障碍均很低。固体钠盐的结构显示了Na ⁺与芳基氧化物以及相邻阴离子的两个氮原子之间的相互作用，从而导致配位聚合物的特性。1,2,4-二氮杂膦in-5-油酸酯分别作为亲核试剂对MeI和R ₃ SiCl进行反应，并安装在（Ph ₃ P）₂ Ru（CO）H片段上，以研究其作为配体的性质。