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Byproducts in the cyclization of ψ-ionone to β-ionone; structural determination of two new ionone isomers

✍ Scribed by C. Kruk; Th. J. de Boer; H. G. Haring; R. Ter Heide; H. Boelens

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
498 KB
Volume
87
Category
Article
ISSN
0165-0513

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New Cyclizing Agents in the Synthesis of β-Ionone from Pseudoionone. -The cyclization of pseudoionone (I) to β-ionone (III) is achieved in excellent selectivity using mixtures of trifluoroacetic acid with sulfuric or fluorosulfonic acid (5.5 : 1-1.25). Additionally, these mixtures can be used direc