Deep eutectic solvents (DESs) have gained attention as green and safe as well as economically and environmentally sustainable alternative to the traditional organic solvents. Here, we report the combination of an atom-economic, very convenient and inexpensive reagent, such as BH3NH3, with bio-based eutectic mixtures as biorenewable solvents in the synthesis of nitroalkanes, valuable precursors of amines. A variety of nitrostyrenes and alkyl-substituted nitroalkenes, including α- and β-substituted nitroolefins, were chemoselectively reduced to the nitroalkanes, with an atom economy-oriented, simple and convenient experimental procedure. A reliable and easily reproducible protocol to isolate the product without the use of any organic solvent was established, and the recyclability of the DES mixture was successfully investigated.
深共熔溶剂(DESs)作为传统有机溶剂的绿色、安全、经济和环境可持续替代品已引起关注。在这里,我们报告了将原子经济、非常方便和廉价的试剂BH
3NH
3与基于
生物的共熔混合物结合在一起,作为
生物可再生溶剂,用于合成硝基
烷烃,这是
氨基的宝贵前体。各种硝基
苯乙烯和烷基取代硝基烯烃,包括α-和β-取代硝基烯烃,均可选择性地还原为硝基
烷烃,采用以原子经济为导向的简单方便的实验程序。建立了一种可靠且易于重复的协议,用于在不使用任何有机溶剂的情况下分离产品,并成功地研究了DES混合物的可回收性。