In order to elucidate the reaction mechanism of ionic liquid-catalyzed CO₂ with 2-aminobenzonitrile, [P₄₄₄₂]₂[Hy] with two N⁻ sites is designed for the efficient preparation of quinazoline-2,4(1H,3H)-diones. The results show that [Hy]²⁻ can activate 2-aminobenzonitrile by hydrogen bonding with –NH₂ in addition to activating CO₂, and the key intermediate is revealed.

中文翻译：

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双位阴离子功能化离子液体将CO2高效催化转化为喹唑啉-2,4(1H,3H)-二酮：重新考虑机理

为了阐明离子液体催化CO ₂与2-氨基苯甲腈的反应机理，设计了具有两个N ^-位点的[P ₄₄₄₂ ] ₂ [Hy] ，用于高效制备喹唑啉-2,4(1 H ,3 H) )-二酮。结果表明，[Hy] ²⁻除了活化CO _{2之外，还可以通过与-NH 2}形成氢键来活化2-氨基苯甲腈，并揭示了关键中间体。