Table 2. Solvent & Reductant Optimization Studies for the Formation of Aniline 2a^a.

entry	reductant	solvent	yield 2a (%)b
1	N2H4·H2O	MeOH	82
2	N2H4·H2O	EtOH	85
3	N2H4·H2O	DCM	75
4	N2H4·H2O	E.A	76
5	N2H4·H2O	water	84
6	NaBH4	water	76
7c	H2 balloon	water	64

^aReaction conditions: nitrobenzene (1 mmol), hydrazine monohydrate (0.5 mL), NaBH₄ (10 mmol), Pd–Au/TiO₂ (0.1 mol % of Pd–Au), and solvent (1 mL).

^bIsolated yields of product 2a.

^cClosed vessel with atmospheric pressure.