Scientific Reports

Table 2 A³ coupling reaction of different substrates using TNTs@Cu(II)-SB catalyst^a.

From: TiO₂ nanotube-supported Cu(II)-Schiff base complex as an efficient heterogeneous catalyst for A³ coupling reactions under solvent-free conditions

Entry	Alkyne	Amine	Aldehyde	Product	Yield (%)^b	TON	TOF(h^− 1)
1					99	49	12.25
2					82	41	10.25
3					61	30.5	7.62
4					100	50	12.5
5					41	20.5	10.25
6					92	46	11.5
7					46	23	5.75
8					68	34	8.5

^aReaction condition: alkyne (0.5 mmol), amine (0.55 mmol), aldehyde (0.55 mmol), and catalyst (4 mg) at 120 °C for 4 h. ^bIsolated yield.

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