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

Author(s): Sakineh Asghari , Robabeh Baharfar , Reza Mohammadian , Samaneh Ahangar Darabi .

Journal Name: Letters in Organic Chemistry

Volume 12 , Issue 1 , 2015

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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.

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Article Details

VOLUME: 12
ISSUE: 1
Year: 2015
Page: [50 - 54]
Pages: 5
DOI: 10.2174/1570178612666141217224100

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