Next Article in Journal
Synthesis of 1-[1H,1H,2H,2H-perfluooctyl]-3-[2-(oxiran-2-yl)ethyl]imidazolium 4-[(2-oxiran-2-yl)ethoxy]benzenesulfonate as a New Perfluorinated Ionic Monomer
Next Article in Special Issue
Previous Article in Journal / Special Issue
Unexpected Formation of 4-[(1-Carbamoyl-3-oxo-1,3-dihydro-2-benzofuran-1-yl)amino]benzoic Acid from 4-[(3-Amino-1-oxo-1H-2-benzopyran-4-yl)amino]benzoic Acid
Short Note


Investigation Group in Heterocyclic Chemistry, Chemistry Department, Universidad Nacional de Colombia-Sede Bogotá, Carrera 30, Calle 45-03, Bogotá 111321, Colombia
Author to whom correspondence should be addressed.
Academic Editor: Fawaz Aldabbagh
Molbank 2022, 2022(3), M1408;
Received: 3 June 2022 / Revised: 8 July 2022 / Accepted: 12 July 2022 / Published: 14 July 2022
(This article belongs to the Collection Heterocycle Reactions)
Various synthetic methodologies to obtain 3,4-diaminoisocumarin nucleus have been reported and described. However, mechanistic analysis based on experimental evidence is lacking. Herein, we report the synthesis of the novel 3-amino-4-(diphenylamino)-1H-2-benzopyran-1-one using a two-step methodology with a new mechanistic proposal to explain the formation of the latter based on previously reported precursors and the established conditions. This compound was afforded in 80% yield. View Full-Text
Keywords: phthalides; isobenzofuranones; diaminoisocoumarins; ring contracting rearrangement phthalides; isobenzofuranones; diaminoisocoumarins; ring contracting rearrangement
Show Figures

Graphical abstract

MDPI and ACS Style

Quiroga-Suavita, F.; Rodríguez, R.; León, O. 3-Amino-4-(diphenylamino)-1H-2-benzopyran-1-one. Molbank 2022, 2022, M1408.

AMA Style

Quiroga-Suavita F, Rodríguez R, León O. 3-Amino-4-(diphenylamino)-1H-2-benzopyran-1-one. Molbank. 2022; 2022(3):M1408.

Chicago/Turabian Style

Quiroga-Suavita, Felipe, Ricaurte Rodríguez, and Omar León. 2022. "3-Amino-4-(diphenylamino)-1H-2-benzopyran-1-one" Molbank 2022, no. 3: M1408.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop