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Acetalization of α,β-unsaturated carbonyl compounds catalyzed by complexes of Pt(II)

✍ Scribed by Enrico Nieddu; Maurizio Cataldo; Francesco Pinna; Giorgio Strukul

Publisher
Elsevier Science
Year
1999
Tongue
French
Weight
219 KB
Volume
40
Category
Article
ISSN
0040-4039

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✦ Synopsis

A class of cationic dipbosphine complexes of Pt(II) are sufficiently Lewis acidic to catalyze the acetalization of aldehydes and ketones. ~t,l~-Unsaturated substrates can be easily acetalized with ethylene glycol under mild conditions in high yield and avoiding side reactions leading to fomaation of undesired by-products arising from the nucleophilic addition to the c.attxm-carbon double bond conjugated to the carbonyl group. A comparison of the behavior of a Pt complex with respect to PTSA as catalysts under" identical conditions shows the superior selectivity of the formex in many cases.

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