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Synthesis of Diphenyl Sulfide from Iodobenzene and Thiophenol using Metal Organic Framework Cu2(NDC)2(DABCO) as An Efficient Heterogeneous Catalyst
Synthesis of Diphenyl Sulfide from Iodobenzene and Thiophenol using Metal Organic Framework Cu2(NDC)2(DABCO) as An Efficient Heterogeneous Catalyst
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Date
2020
Authors
Nguyen Van Chi
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Abstract
A metal-organic framework Cu2(NDC)2(DABCO) was synthesized from
copper nitrate trihydrate, 2,6-Napthalenedicarboxylic acid (H2NDC), and
1,4-diazabicyclo[2.2.2]octane (DABCO) by solvothermal method. Its
physicochemical properties were confirmed by several techniques such
as X-ray powder diffraction (PXRD), Fourier transform infrared (FT-IR),
scanning electron microscopy (SEM), and transmission electron
microscopy (TEM). Cu2(NDC)2(DABCO) appeared as well-shaped
crystals. To get diphenyl sulfide as desired product from the C-S cross
coupling reaction of iodobenzene and thiophenol, the
Cu2(NDC)2(DABCO) was used as heterogeneous catalyst in the
presence of LiO-tBu as base. The results showed that the
transformation could proceed with more than 93% reaction conversion
being obtained after 6 h at 120 oC when using 5 mol%
Cu2(NDC)2(DABCO) catalyst in the presence of LiO-tBu. The solid
catalyst could be recovered and reused five times without a significant
degradation in catalytic activity. The coupling reaction could only
proceed to achieve major product in the presence of the
Cu2(NDC)2(DABCO catalyst.
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Keywords
C-S coupling,
iodobenzene,
LiO-t-Bu,
Cu2(NDC)2DABCO,
thiophenol