Efficient synthesis of substituted 3-acyl-3,4-dihydrobenzo[d][1,2,3]triazines

Acylated o-triazenylbenzylamines were cyclized to give 3-acyl-3,4-dihydrobenzo[d][1,2,3]triazines in good yields. Thus, a novel cyclization via a Jacobsen indazole-type reaction to aminoindazoles is observed in this context.

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