Using 1,2-Dialkylbenzenes as Substrates

This type of substrate affords 1,2,3,4-tetrahydrophthalazines. All the available examples that follow employ a-bromoalkyl substrates. 

This rarely used synthesis is illustrated by the cyclocondensation of o-methyl-benzophenone (35) with diethyl azodicarboxylate to afford diethyl 1-hydroxy-1-phenyl-l,2,3,4-tetrahydro-2,3-phthalazinedicarboxylate (36) (PhH, hv, N2, 20°C, 

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