Summary.
Cupric sulfate pentahydrate was found to be an efficient catalyst for the protection of aldehydes as 1,1-diacetates in high yields in a solvent-free system at room temperature. Ketones are not affected under these reaction conditions.
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Heravi, M., Taheri, S., Bakhtiari, K. et al. Cupric Sulfate Pentahydrate: A Mild and Efficient Catalyst for the Chemoselective Synthesis of 1,1-Diacetates from Aldehydes in a Solvent-Free System. Monatsh. Chem. 137, 1075–1078 (2006). https://doi.org/10.1007/s00706-005-0499-0
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DOI: https://doi.org/10.1007/s00706-005-0499-0