Tetrahedron Letters p. 1845 - 1848 (1989)
Update date:2022-08-03
Topics:
Azzena, Ugo
Cossu, Sergio
De Lucchi, Ottorino
Melloni, Giovanni
A synthetic methodology for the preparation of the formal Diels-Alder cycloadducts of alkyl- and aryl-substituted acetylenes which exemplifies the utility of bis(phenylsulfonyl)alkenes 1 in organic synthesis is presented.The procedure entails <4+2>-cycloaddition of (e)-1,2-bis(phenylsulfonyl)-1-chloroethylene (4), grignard reaction and desulfonylation; each step occurs in high yield.
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