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Your search keyword '"Lucia De Crescentini"' showing total 6 results
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6 results on '"Lucia De Crescentini"'

1. Challenge N- versus O-six-membered annulation: FeCl3-catalyzed synthesis of heterocyclic N,O-aminals

Author

Giacomo Mari, Lucia De Crescentini, Gianfranco Favi, Fabio Mantellini, Diego Olivieri, and Stefania Santeusanio

Subjects
α-aminoacetals, fused-ring systems, heterocyclic hemiaminals, heterocyclic n,o-aminals, multicomponent reactions, Science, Organic chemistry, QD241-441
Abstract

A new class of heterocyclic N,O-aminal and hemiaminal scaffolds was successfully obtained by means of a three-component reaction (3-CR) of 1,2-diaza-1,3-dienes (DDs), α-aminoacetals and iso(thio)cyanates. These stable imine surrogates are generated from key-substituted (thio)hydantoin intermediates through selective FeCl3-catalyzed intramolecular N-annulation.

Published
2024
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3. A facile protocol for the preparation of 2-carboxylated thieno [2,3-b] indoles: a de novo access to alkaloid thienodolin

Author

Giacomo Mari, GIANFRANCO FAVI, Fabio Mantellini, Stefania Santeusanio, and Lucia De Crescentini

Subjects
Organic Chemistry, Physical and Theoretical Chemistry, Biochemistry
Abstract

A metal-free strategy towards thieno [2,3-b] indoles from 1,2-diaza-1,3-dienes and indoline 2-thione is described. The mild reaction conditions required make this method amenable for a one-pot approach to thienodolin, a valuable natural alkaloid.

Published
2022
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6. Practical and sustainable preparation of pyrrolo[2,3-b]indoles by Cu/Fe catalyzed intramolecular C(sp2)–H amination

Author

Giacomo Mari, Matteo Corrieri, GIANFRANCO FAVI, Fabio Mantellini, Stefania Santeusanio, and Lucia De Crescentini

Subjects
C(sp2)–H amination, α-indolylhydrazones, fused N-heterocycles, Environmental Chemistry, Pollution
Abstract

The direct synthesis of pyrrolo[2,3-b]indoles is developed using a Cu/Fe cocatalyzed intramolecular cycloamination of α-indolylhydrazones. This transformation proceeds cleanly and selectively at 50 °C in air, with water as the only reaction medium.

Published
2022

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