Abstract
Ozonolysis of carotol (1) gives dihydroxy ketone 2 (63% yield), the absolute configuration of which was established by X-ray crystallography. An acidic dehydration of 2 delivers a mixture of isomeric ketones 3 and 4 (3:1) that, catalysed by Pd/C in cyclohexene, yields a 1:1 thermodynamic mixture of 3 and 6. Ketone 6 exhibits an intensive musk odour. (© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)
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