Scientific Reports

Table 1 Optimizing the conditions for the oxidation of methyl phenyl sulfide using KIT-6@L–H-Pd.

From: l-Histidine-functionalized KIT-6 with embedded palladium nanoparticles as an efficient heterogeneous catalyst for oxidation of sulfide to sulfoxide and amination of aryl halides


Entry	Cat. (g)	Solvent	H₂O₂ (mg)	Time (min)	Yield
1	-	Solvent-free	0.3	5 h	Trace
2	0.004	Solvent-free	0.3	30	69
3	0.08	Solvent-free	0.3	30	82
4	0.01	Solvent-free	0.3	30	98
5	0.015	Solvent-free	0.3	30	98
6	0.01	DMSO	0.3	30	57
7	0.01	PEG-400	0.3	30	55
8	0.01	EtOH	0.3	30	42
9	0.01	CH₃CN	0.3	30	65
10	0.01	Solvent-free	0.2	30	86
11	0.01	Solvent-free	0.4	30	94
12	0.01^a	Solvent-free	0.4	30	N.R
13	0.01^b	Solvent-free	0.4	30	Trace

^a Catalyzed byKIT-6.
^b Catalyzed byKIT-6@L–H.

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