N-alkylations of carbazoles with a variety of secondary and hindered primary alkyl iodides can be achieved by using a simple precatalyst (CuI) under mild conditions (0 °C) in the presence of a Brønsted base; at higher temperature (30 °C), secondary alkyl bromides also serve as suitable coupling partners. A Li[Cu(carbazolide)_2] complex has been crystallographically characterized, and it may serve as an intermediate in the catalytic cycle.
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机译：咔唑与各种仲伯烷基碘和受阻伯烷基碘的N-烷基化反应可以通过在温和条件下（0°C）在布朗斯台德碱的存在下使用简单的预催化剂（CuI）来实现。在较高温度（30°C）下，仲烷基溴化物也可以作为合适的偶合伙伴。 Li [Cu（咔唑化物）_2]配合物已在晶体学上进行了表征，它可以用作催化循环的中间体。
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