Preparation and Optical Properties of Novel 3-Alkoxycarbonyl Aza- and Diazacoumarins

Abstract

A series of 14 new 3-alkoxycarbonyl 6-aza-, 7-aza-, and 6,8-diaza-coumarins was prepared using various strategies involving either a Knoevenagel or a Pechmann condensation reaction. The coumarin nucleus displays different reactive functional groups allowing straightforward derivatization. The optical properties of the new azacoumarins were measured in methanol.

Keywords:

• Azacoumarin
• chromophore
• coumarin
• Knoevenagel condensation
• Pechmann condensation

ACKNOWLEDGMENT

The authors thank Mr. Stephane Nehlig for the analytical work.