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首页> 外文期刊>Green chemistry >Eco-friendly construction of highly functionalized chromenopyridinones by an organocatalyzed solid-state melt reaction and their optical properties
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Eco-friendly construction of highly functionalized chromenopyridinones by an organocatalyzed solid-state melt reaction and their optical properties

机译：通过有机催化的固态熔融反应生态构建高官能化的吡啶并吡啶酮及其光学性质

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摘要

The library construction of highly functionalized and diverse chromenopyridinones was achieved by three-component reactions of various 4-hydroxycoumarins with ammonium acetate and 3-formyl-chromones under L-proline catalyzed solid-state melt conditions. The advantages of this protocol include the use of an inexpensive organocatalyst, avoidance of toxic organic solvents, environmentally benign conditions, an easy work-up procedure and good to excellent product yields. The optical properties of these pi-expanded varieties of the synthesized chromenopyridinone derivatives were also examined. A chromeno[4,3-b] pyridine nucleus bearing an electron donating group exhibited strong emission in the blue-green region of the visible spectrum.
机译：在L-脯氨酸催化的固态熔体条件下，各种4-羟基香豆素与乙酸铵和3-甲酰基-色酮的三组分反应可实现高度官能化和多样化的吡啶并吡啶酮的文库构建。该协议的优点包括使用廉价的有机催化剂，避免使用有毒的有机溶剂，对​​环境无害的条件，易于后处理的过程以及良好的产品收率。还检查了这些π-扩链的合成色吡啶并吡啶酮衍生物的光学性质。带有给电子基团的铬诺[4,3-b]吡啶核在可见光谱的蓝绿色区域内显示出强发射。

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