Synthesis of 5-substituted 1H-tetrazole derivatives catalyzed by Co-(PYT)₂@BNPs nanocatalyst.

Entry	Nitrile	Product	Time (min)	Yield (%)a	Melting point	Reference
1			120	98	214–215	36
2			180	94	223–226	41
3			200	95	179–181	36
4			50	93	210–211	41
5			190	96	261–262	36
6			405	98	217–220	40
7			50	93	229–231	40
9			360	95	149–151	44
10			16 h	89	247–249	50 and 51
11			46 h	71	245–248	52 and 53

^aIsolated yield.