The sequential addition/elimination/cycloammination of 4-pentynones in the presence of benzylamine or ammonia produces 1,2,3,-5-substituted and 2,3,5-substituted pyrroles and fused pyrrole sytems, respectively in good to high yields. The methodology has been extended to the preparation of the 17β-hydroxyandrost-4-ene[3,2-b](1-benzyl-5-methyl)pyrrole.
Sequential addition/elimination/annulation reactions of 4-pentynones with benzylamine and ammonia / A. Arcadi, E. Rossi. - In: SYNLETT. - ISSN 0936-5214. - 1997:6(1997), pp. 667-668.
Sequential addition/elimination/annulation reactions of 4-pentynones with benzylamine and ammonia
E. RossiUltimo
1997
Abstract
The sequential addition/elimination/cycloammination of 4-pentynones in the presence of benzylamine or ammonia produces 1,2,3,-5-substituted and 2,3,5-substituted pyrroles and fused pyrrole sytems, respectively in good to high yields. The methodology has been extended to the preparation of the 17β-hydroxyandrost-4-ene[3,2-b](1-benzyl-5-methyl)pyrrole.
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