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Benzopyrans. 31. Reaction of 1,1-diacetyl-2-(6-methyl-4-oxo-4H-1-benzopyran-3-yl)ethylene with phenyldiazomethane
C K GHOSH, S SAHANA
Published in -
1993
Volume: 49
   
Issue: 19
Pages: 4135 - 4140
Abstract
Phenyldiazomethane yields with the title alkene 1 a mixture of the trans-cyclopropane 6, benzopyran 8, pyrazole 9, and cis-dihydrofuran 12. The cyclopropane 6 thermally rearranges to a trans-dihydrofuran tentatively assigned the structure 4. © 1993.
About the journal
JournalTetrahedron
Publisher-
ISSN0040-4020