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Cycloadditions of 3,4-dihydro-2H-pyrrole 1-oxide to methylene-γ-butyrolactones

✍ Scribed by David Alonso-Perarnau; Pedro de March; Mustafa el Arrad; Marta Figueredo; Josep Font; Teodor Parella

Publisher
Elsevier Science
Year
1997
Tongue
French
Weight
579 KB
Volume
53
Category
Article
ISSN
0040-4020

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✦ Synopsis

In the reactions of nitrone 1 with several methylene-y-butyrolactones 2-5 we have isolated and identified in all the cases the corresponding [3+21 cycloadducts. In all the adducts the oxygen atom of the dipole has linked to the more substituted carbon atom of the exocyclic double bond of the lactone. For iaetone 5 the exneyclic double bond has shown higher reactivity than the endocyclic. Herein three new hete~-Tclic skeletons are repot'ted.

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