Helvetica Chimica Acta p. 759 - 765 (1992)
Update date:2022-08-04
Topics:
Schulte-Elte, Karl H.
Pamingle, Herve
Uijttewaal, Arnold P.
Snowden, Roger L.
Acid-mediated cyclisation of trienone 8, readily available from 2,3-dimethylbutanal (1; five steps: 47percent yield), using fluorosulfonic acid (6.8 mol-equiv.) in 2-nitropropane at -70 deg, afforded a 14:9:1 mixture (70percent yield) of (+/-)-cis-α-irone
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