NiGa layered double oxide (Ni₃Ga‐LDO) has been found to be an efficient heterogeneous catalyst for the α‐cyanation of aromatic tertiary amines using malononitrile as a low‐toxic cyanide source. Various aniline and aryltetrahydroisoquinoline derivatives were found to be tolerated by the catalytic system, and good to excellent yields for the corresponding products could be obtained. The results indicated that CN⁻ might be produced via a oxidation‐decomposition path, and the reaction probably proceeded via a cross‐dehydrogenative coupling process. In addition, good stability and recyclability were observed for Ni₃Ga‐LDO catalyst in the reaction.

中文翻译：

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NiGa层状双氧化物催化丙二腈作为低毒氰化物源的芳香叔胺的α-氰化

已发现使用NiGa层状双氧化物（Ni ₃ Ga-LDO）是有效的非均相催化剂，它使用丙二腈作为低毒氰化物源，芳族叔胺α-氰化。发现各种苯胺和芳基四氢异喹啉衍生物可被该催化体系所耐受，并且可获得相应产物的良好至优异的产率。结果表明，CN ^-可以经由氧化分解路径来制造，该反应可能是通过交叉脱氢偶联过程进行。此外，反应中的Ni ₃ Ga-LDO催化剂具有良好的稳定性和可回收性。