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Synlett 1995; 1995(7): 742-744
DOI: 10.1055/s-1995-5053
DOI: 10.1055/s-1995-5053
letter
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New Easy Access to Polycyclic Oxygen Containing Heterocycles
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Publikationsverlauf
Publikationsdatum:
31. Dezember 2000 (online)
Polycyclic tetrahydrofuran or hexahydro-oxepin derivatives and tetrahydrofuryl tetrahydropyrans were conveniently obtained from dihydropyranylcyclobutanols and dihydropyranylketones respectively. These latter starting materials were easily prepared by elimination-addition from 5-bromo-3,4-dihydropyran.
dihydropyranyl - methylene cyclobutanols - tetrahydrofurans - hexahydro-oxepins - tetrahydropyranyl tetrahydrofurans - ring enlargement