The NHC–Au–OTf [NHC = 1,3-bis(2,6-di-isopropylphenyl)-imidazol-2-ylidene] catalyst was tested in the alkoxylation and hydration of alkynes in a wide set of neoteric solvents for the first time. We found that most of these solvents (ethyl lactate, glycerol, propylene carbonate, D-limonene, γ-valerolactone, and p-cymene) are comparable or better solvents with respect to traditional VOSs. An important
NHC-Au-OTf [NHC = 1,3-双(2,6-二异丙基苯基)-
咪唑-2-基]催化剂在多种新型溶剂中的
炔烃烷氧基化和
水合反应中进行了测试。时间。我们发现这些溶剂中的大多数(
乳酸乙酯,
甘油,
碳酸亚
丙酯,
D-柠檬烯,
γ-戊内酯和对-Cymene)相对于传统VOS而言是可比或更好的溶剂。
γ-戊内酯在非活性二
苯乙炔的
水合中发现了重要的有益作用,相对于文献值,TOF提高了一个数量级。动力学实验和DFT计算似乎表明可以考虑溶剂的极性以及溶剂本身上合适的质子受体/供体官能团的存在。