Optimizing the best conditions for the synthesis of tetrazoles in the presence of Co-(PYT)₂@BNPs nanocatalyst.

Entry	Amount of the catalyst (mg)	Solvent	NaN3 (mmol)	Time (min)	Temperature (°C)	Yield (%)a
1	—	PEG	1.4	150	120	N. R.b
2	40	PEG	1.4	310	120	85
3	50	PEG	1.4	100	120	98
4	50	PEG	1.3	120	120	80
5	50	DMSO	1.4	100	120	81
6	50	H2O	1.4	100	Reflux	20
7	50	PEG	1.4	100	100	49

^aIsolated yield within 120 min.

^bNo reaction.