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ZrCl4 as a mild and efficient catalyst for the one-pot conversion of TBS and THP ethers to acetates

✍ Scribed by Ch.Sanjeeva Reddy; G Smitha; S Chandrasekhar

Book ID
104253773
Publisher
Elsevier Science
Year
2003
Tongue
French
Weight
184 KB
Volume
44
Category
Article
ISSN
0040-4039

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✦ Synopsis

A mild, efficient and chemoselective method has been developed for the direct transformation of tert-butyldimethylsilyl and tetrahydropyranyl protected alcohols into the corresponding acetates with acetic anhydride and zirconium(IV) chloride as the catalyst in acetonitrile, in a one-pot reaction with high yields and short reaction times. This method has been applied to a variety of substrates.

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## Abstract The condensation reaction of aldehydes, β‐ketoesters and urea/thiourea in presence of a catalytic amount of CuPy~2~Cl~2~ complex proceeded under very mild reaction conditions in high yield (80‐90%).