Synthesis 2017; 49(11): 2501-2512
DOI: 10.1055/s-0036-1588147
paper
© Georg Thieme Verlag Stuttgart · New York

An Improved Environmentally Friendly Approach to 4-Nitro-, 4-Sulfonyl-, and 4-Aminoquinolines and 4-Quinolones through Conjugate Addition of Nucleophiles to β-(2-Aminophenyl)-α,β-ynones

Navnath D. Rode
a   Dipartimento di Scienze Fisiche e Chimiche, Università di L’Aquila, Via Vetoio, 67010 Coppito (AQ), Italy
,
Antonio Arcadi
a   Dipartimento di Scienze Fisiche e Chimiche, Università di L’Aquila, Via Vetoio, 67010 Coppito (AQ), Italy
,
Marco Chiarini
b   Facoltà di Bioscienze e Tecnologie Agroalimentari e Ambientali, Università di Teramo, via R. Balzarini, 1, 64100 Teramo (Te), Italy   Email: fabio.marinelli@univaq.it
,
Fabio Marinelli*
a   Dipartimento di Scienze Fisiche e Chimiche, Università di L’Aquila, Via Vetoio, 67010 Coppito (AQ), Italy
› Author Affiliations
Further Information

Publication History

Received: 13 January 2017

Accepted after revision: 27 January 2017

Publication Date:
22 February 2017 (online)


Abstract

Sequential addition/annulation reactions of sulfinate and nitrite anions to β-(2-aminophenyl)-α,β-ynones led to valuable 4-sulfonylquinolines and 4-nitroquinolines. The latter proved to be versatile precursors of N-unsubstituted 4-aminoquinolines and 4-quinolones. Reaction of β-(2-aminophenyl)-α,β-ynones with DMF/NaOH resulted in the formation of 4-(dimethylamino)quinolines. The use of an alternative CO-free procedure for the preparation of substrates β-(2-aminophenyl)-α,β-ynones allowed extension of the methodology to the synthesis of 4-substituted 2-alkylquinolines.

Supporting Information