Synthesis of 3-aroyl-4-(3-chromonyl)-2-pyrazolines

✍ Scribed by Albert Lévai; József Jekö

• Publisher: Journal of Heterocyclic Chemistry
• Year: 2002
• Tongue: English
• Weight: 37 KB
• Volume: 39
• Category: Article
• ISSN: 0022-152X
• DOI: 10.1002/jhet.5570390636

✦ Synopsis

Abstract

New 3‐aroyl‐4‐(3‐chromonyl)‐2‐pyrazolines have been synthesized by the reaction of 3‐(3‐aryl‐3‐oxo‐propenyl)chromen‐4‐ones and diazomethane. Some of these 2‐pyrazolines have also been N‐acylated with a mixture of anhydrous pyridine and acetic anhydride or propionic anhydride. Structures of all new compounds have been elucidated by elemental analyses, mass spectrometry, ir and nmr spectroscopic measurements.