Solvent-free condensations of ketones with malononitrile catalysed by methanesulfonic acid/morpholine system

Green Chemistry

Volumn 11, Issue 6, 2009, Pages 863-86

  Gora M ^a   Kozik, B ^a   Jamrozy K ^a   Luczynski M K ^b   Brzuzan, P ^b   Wozny M ^b  

^a JAGIELLONIAN UNIVERSITY   (Poland)

^b UNIVERSITY OF WARMIA AND MAZURY IN OLSZTYN   (Poland)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 67649083877     PISSN: 14639262     EISSN: 14639270     Source Type: Journal    
DOI: 10.1039/b820901d     Document Type: Article

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26. For crystallization of compounds 13b–16b 10–15 mL of ethanol with 2 drops of glacial acetic acid were used. 17b was crystallized from toluene/heptane (10 mL/10 mL) mixture with 3 drops of glacial acetic acid. Crude 18b was dissolved in a small volume of diethyl ether and after addition of 2 drops of glacial acetic acid, cooled to −20 °C in a refrigerator.