TaCl5-Silicagel and TaCl5 as new Lewis acid systems for selective tetrahydropyranylation of alcohols and thioacetalisation, trimerisation and aldolisation of aldehydes

S. Chandrasekhar, Mohamed Takhi, Y. Ravindra Reddy, Suchismita Mohapatra, C. Rama Rao, K. Venkatram Reddy

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Abstract

TaCl5 adsorbed on silicagel has been utilized for the first time as Lewis acid catalyst for protection of aldehydes and alcohols as thiocetals and THP ethers respectively. Similarly TaCl5 has been exploited as an useful Lewis acid for chemoselective trimerisation and/or aldolisation of aldehydes.

Original languageEnglish
Pages (from-to)14997-15004
Number of pages8
JournalTetrahedron
Volume53
Issue number44
DOIs
StatePublished - 3 Nov 1997

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