alumina is found to promote the conjugate addition of indoles to nitroalkenes in solventless conditions at 60 °C. Nitroalkenes can be replaced by nitro alcohols that are converted into nitroolefins under the reaction conditions. Alternatively, a tandem nitroaldol-dehydration allows the utilization of nitroalkanes and aldehydes as remote precursors of reactive nitroalkenes in a ‘one–pot’ synthesis of 3-substituted
发现碱性氧化铝可在60°C无溶剂条件下促进
吲哚与硝基烯烃的共轭加成。硝基烯烃可以被在反应条件下转化为硝基烯烃的硝基醇代替。另外,串联的硝基羟醛脱
水可以在三取代的
吲哚的“一锅法”合成中利用硝基烷和醛作为反应性硝基烯的遥远前体。