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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 37, 2007 - Issue 11
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Original Articles

Mild Method for Ullmann Reaction of 2‐Chlorobenzoic Acids and Aminothiazoles or Aminobenzothiazoles under Ultrasonic Irradiation

Rolando F. Pellón Center of Pharmaceutical Chemistry, Havana, CubaCorrespondence[email protected]
,
Maite L. Docampo Center of Pharmaceutical Chemistry, Havana, Cuba
&
Mirta L. Fascio Buenos Aires University, Ciudad Autónoma de Buenos Aires, Argentina
Pages 1853-1864 | Received 31 Oct 2006, Published online: 30 Jun 2007
 
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Abstract

One‐pot syntheses of 5H‐[1,3]thiazolo[2,3‐b]quinazolin‐5‐one, 12H‐[1,3]benzothiazolo[2,3‐b]quinazolin‐12‐one, and corresponding derivatives were developed using the copper‐catalyzed Ullmann condensation. The use of ultrasonic irradiation enhanced yields and reduced the reaction time to minutes.

Acknowledgment

The authors thank Anais Fernández and Herman Velez from Centro de Química Farmacéutica (CQF) and Miriam A. Alho and Adriana A. Kolender from University de Buenos Aires (UBA) University for their kindness for measuring NMR and mass.

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