Synthesis of Ruthenium Complex Based on 2,6-Bis(1-(phenyl)-1H-benzo[d]imidazol-2-yl)pyridine and 2-(1-Phenyl-1H-benzo[d]imidazol-2-yl)benzoate and Catalytical Oxidation Property of 1-(1H-Benzo[d]imidazol-2-yl)ethanol to 1-(1H-Benzo[d]imidazol-2-yl)ethanone with H₂O₂

Table 3

Optimization of reaction .

Entry	Substrate : H2	T (°C)	Conv. (%	Yield (%
1	1 : 3	30	38	35
2	1 : 3	50	74	69
3	1 : 3	80	93	82
4	1 : 1	50	58	56
5	1 : 2	50	66	63
6	1 : 4	50	87	80
	1 : 3	50	4	2
	1 : 3	50	78	76
	1 : 3	50	89	81

condition: (1H-benzo[d]imidazol-2-yl)ethanol (2 mmol), catalyst (2 × 10⁻³ mmol), 60 min. ratio. by GC. the absence of catalyst. (2 × 10⁻⁴ mmol). (2 × 10⁻² mmol).