Tetrahedron Letters p. 7425 - 7428 (1997)
Update date:2022-08-05
Topics:
De Lera, Angel R.
Rey, Jose Garcia
Hrovat, David
Iglesias, Beatriz
Lopez, Susana
Acid-induced electrocyclic ring-closure of (2Z)-4-tert-butyl-3-methyl-2,4,5,7-tetraene acetals 3 afforded a mixture of alkylidenecyclopentene dioxanes Z-4 and E-4. The lack of torquoselective effects on the electrocyclization suggested the transition stat
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