Abstract
We report the synthesis of novel alkyl 4-alkyl-2,8-dioxo-2H,8H-pyrano[2,3-f]chromene-10-carboxylates by the reaction of 7-hydroxy coumarins and dialkyl acetylenedicarboxylates in the presence of triphenylphosphine, when alkyl propiolates were employed O-vinylated coumarin derivatives were obtained.
Keywords: Acetylenic esters, 7-Hydroxy coumarin derivatives, One-pot synthesis, Triphenylphosphine.
Graphical Abstract
Letters in Organic Chemistry
Title:One-Pot Synthesis of Alkyl 4-alkyl-2,8-dioxo-2H,8H-pyrano[2,3- f]chromene-10-carboxylates and Alkyl 2(E)-3-[(4-alkyl-2-oxo-2H-chromen- 7-yl)oxy]acrylates
Volume: 12 Issue: 1
Author(s): Sakineh Asghari, Robabeh Baharfar, Reza Mohammadian and Samaneh Ahangar Darabi
Affiliation:
Keywords: Acetylenic esters, 7-Hydroxy coumarin derivatives, One-pot synthesis, Triphenylphosphine.
Abstract: We report the synthesis of novel alkyl 4-alkyl-2,8-dioxo-2H,8H-pyrano[2,3-f]chromene-10-carboxylates by the reaction of 7-hydroxy coumarins and dialkyl acetylenedicarboxylates in the presence of triphenylphosphine, when alkyl propiolates were employed O-vinylated coumarin derivatives were obtained.
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Asghari Sakineh, Baharfar Robabeh, Mohammadian Reza and Ahangar Darabi Samaneh, One-Pot Synthesis of Alkyl 4-alkyl-2,8-dioxo-2H,8H-pyrano[2,3- f]chromene-10-carboxylates and Alkyl 2(E)-3-[(4-alkyl-2-oxo-2H-chromen- 7-yl)oxy]acrylates, Letters in Organic Chemistry 2015; 12 (1) . https://dx.doi.org/10.2174/1570178612666141217224100
DOI https://dx.doi.org/10.2174/1570178612666141217224100 |
Print ISSN 1570-1786 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6255 |
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