Improved, convenient, and reliable routes for the synthesis of 4‐, 5‐, 6‐, and 7‐azaindole, 7‐methyl‐4‐azaindole, 7‐methyl‐6‐azaindole, and the hitherto unreported 7‐amino‐4‐azaindole are described. The syntheses have been accomplished either by significant modifications to established procedures or by new methods which afford the compounds in improved yields.
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I. B. Mahadevan (1992) studied this question.
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