Premium
1,4‐Dipolar Cycloaddition Reactions in Ionic Liquids: A Facile Synthesis of 9a H ,15 H ‐[1]Benzopyrano[3′,2′: 3,4]pyrido[2,1‐ a ]isoquinolines (=9a H ,15 H ‐Benzo[ a ][1]benzopyrano[2,3‐ h ]quinolizines)
Author(s) -
Reddy Basi V. Subba,
Yadav Nagendra Nath,
Srivastava Nikhil,
Yadav Jhillu S.,
Sridhar Balasubramanian
Publication year - 2012
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.201100250
Subject(s) - chemistry , isoquinoline , cycloaddition , ionic bonding , ionic liquid , medicinal chemistry , organic chemistry , catalysis , ion
Ionic liquids were found to be a suitable reaction medium for 1,4‐dipolar cycloaddition reactions of an isoquinoline, an activated alkyne, and a 4‐oxo‐4 H ‐1‐benzopyran‐3‐carboxaldehyde at room temperature to afford [1]benzopyrano‐pyrido‐isoquinoline (=9a H ,15 H ‐benzo[ a ][1]benzopyrano[2,3‐ h ]quinolizine) derivatives selectively in good yields. The ionic liquid can be recovered and recycled in further runs without loss of activity.