Photocatalyzed [2+ 2+ 2]-cycloaddition of nitriles with acetylene: an effective method for the synthesis of 2-pyridines under mild conditions

B Heller, B Sundermann, H Buschmann…

Index: Heller, Barbara; Sundermann, Bernd; Buschmann, Helmut; Drexler, Hans-Joachim; You, Jingsong; Holzgrabe, Ulrike; Heller, Eberhard; Oehme, Guenther Journal of Organic Chemistry, 2002 , vol. 67, # 13 p. 4414 - 4422

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Citation Number: 88

Abstract

The photocatalyzed [2+ 2+ 2]-cycloaddition of nitriles with 2 equiv of acetylene to 2-pyridines can be carried out under mild conditions and represents a valuable extension to common synthetical methods. For the ideal wavelength range (350-500 nm), lamps as well as sunlight can be used. Working at room temperature and in organic solvents such as toluene or hexane as well as in water gives satisfying results in many cases. However, it is also ...