2001 cycloaddition reactions cycloaddition reactions O 0070
-0301,3-Dipolar Cycloadditions of 3-Bromo-1,5-and 3-Bromo-1,7azulenequinones with Diazomethane, Diphenylnitrilimine, and Benzonitrile Oxide.-Different products are obtained and the reaction of the azulenequinone (X) with benzonitrile oxide does not give any product.