Acetonyltriphenylphosphonium Bromide and Its Polymer-Supported Analogues as Catalysts for the Protection of Carbonyl Compounds as Acetals or Thioacetals

Yung-Son Hon Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi, Taiwan, R.O.C.; Institute of Chemistry, Academia Sinica, Nankang, Taipei, Taiwan, R.O.C.

Chia-Fu Lee Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi, Taiwan, R.O.C.

Rong-Jiunn Chen Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi, Taiwan, R.O.C.

Yi-Fen Huang Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi, Taiwan, R.O.C.

Abstract

Both acetonyltriphenylphosphonium bromide (ATPB) and poly-p-styryldiphenylacetonylphosphonium bromide (PATPB) are excellent catalysts in the protection of aldehydes as acetals or thioacetals. In general, ATPB is highly selective as ketones do not give good yields of ketals with this catalyst.

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Acknowledgment

We are grateful to the National Science Council, National Chung Cheng University and Academia Sinica, Republic of China for financial support.

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Acetonyltriphenylphosphonium Bromide and Its Polymer-Supported Analogues as Catalysts for the Protection of Carbonyl Compounds as Acetals or Thioacetals

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Acetonyltriphenylphosphonium Bromide and Its Polymer-Supported Analogues as Catalysts for the Protection of Carbonyl Compounds as Acetals or Thioacetals

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