Transition‐Metal‐Free Sonogashira‐Type Coupling Reactions in Water

Abstract

Abstract Microwave‐assisted transition‐metal‐free Sonogashira‐type coupling reactions are described. The reactions are run in water as the sole solvent, without the need for copper( I ) or any transition‐metal−phosphane complex. The scope of the methodology was tested by reaction of a wide variety of aryl halides and heteroaryl halides. The reaction was also investigated under conventional heating conditions. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)