The effect of alkylation on the terminal position of aryl and heteroaryl hydrazines in the Fischer indole synthesis was examined. Compared to their unalkylated counterparts, reactions using alkylated hydrazines provided indole products with higher yields and faster rates. The reactions can be conducted at lower temperatures and are compatible with acid-sensitive functionality. The terminally alkylated
研究了烷基化对 Fischer
吲哚合成中芳基和杂芳基
肼末端位置的影响。与未烷基化的对应物相比,使用烷基化
肼的反应提供了具有更高产率和更快速率的
吲哚产物。该反应可以在较低温度下进行,并且与酸敏感官能团相容。末端烷基化的
肼很容易通过新的两步序列制备并保持为稳定的
肼盐。盐的温和形成以及有利的 Fischer
吲哚反应条件突出了这种方法在后期合成应用中的潜力。