Thermolysis of 2-azido-3-(R-anilino)-1,4-naphthoquinones. Nitrene insertion versus hydrogen abstraction
摘要:
2-chloro-3-(R-anilino)-1,4-naphthoquinones react with sodium azide upon refluxing in DMF. The thermochemistry of 2-azido-3-(R-anilino)-1,4-naphthoquinone is strongly modified by the substituent on aniline. Having an strong electron-donor like O-R results in the generation of a phenazine while having an electron-withdrawing substituent results in the formation of 2-amino-3-(R-anilino)-1,4-naphthoquinone. The products obtained are explained in terms of singlet and/or triplet nitrene chemistry. (C) 2020 Elsevier Ltd. All rights reserved.
Buu-Hoi, Bulletin de la Societe Chimique de France, 1944, vol. <5> 11, p. 578,581
作者:Buu-Hoi
DOI:——
日期:——
Thermolysis of 2-azido-3-(R-anilino)-1,4-naphthoquinones. Nitrene insertion versus hydrogen abstraction
作者:Silvia E. Loredo-Carrillo、Elisa Leyva、Matthew S. Platz、Agobardo Cárdenas-Chaparro、Antonio Martínez-Richa
DOI:10.1016/j.tetlet.2020.151731
日期:2020.4
2-chloro-3-(R-anilino)-1,4-naphthoquinones react with sodium azide upon refluxing in DMF. The thermochemistry of 2-azido-3-(R-anilino)-1,4-naphthoquinone is strongly modified by the substituent on aniline. Having an strong electron-donor like O-R results in the generation of a phenazine while having an electron-withdrawing substituent results in the formation of 2-amino-3-(R-anilino)-1,4-naphthoquinone. The products obtained are explained in terms of singlet and/or triplet nitrene chemistry. (C) 2020 Elsevier Ltd. All rights reserved.