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Enantioselective dehydration of butan-2-ol using zeolite Y modified with dithiane oxides: comments on the nature of the active site

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Abstract

Modification of zeolite H-Y by dithiane oxides (2-R-1,3-dithiane 1-oxide, R = H, CH3, C6H5) is shown to enhance significantly its activity for the acid-catalysed gas phase dehydration of butan-2-ol. The rate enhancement is observed for catalysts that are prepared using two commercial samples of zeolite H-Y. The origin of this effect is examined using in situ FTIR spectroscopy and 27Al and 29Si MAS NMR spectroscopy studies of the modified zeolite. The rate enhancement is considered to result from a specific interaction between the dithiane oxide modifier with both the extra-framework and framework aluminium in the zeolite.

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Authors
  1. G.J. Hutchings
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  2. R. Wells
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  3. S. Feast
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  4. M.R.H. Siddiqui
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  5. D.J. Willock
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  6. F. King
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  7. C.H. Rochester
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  8. D. Bethell
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  9. P.C.B. Page
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Hutchings, G., Wells, R., Feast, S. et al. Enantioselective dehydration of butan-2-ol using zeolite Y modified with dithiane oxides: comments on the nature of the active site. Catalysis Letters 46, 249–254 (1997). https://doi.org/10.1023/A:1019030921296

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