Kinetic control wins out over thermodynamic control in Friedel–Crafts acyl rearrangements
作者:Tahani Mala’bi、Sergey Pogodin、Israel Agranat
DOI:10.1016/j.tetlet.2011.02.026
日期:2011.4
Friedel–Crafts acyl rearrangements in polyphosphoric acid at 130–150 °C to give 3-methylbenz[de]anthracen-1-one via the kinetically-controlled 1,9-diacetylanthracene. The rearrangement mechanism is supported by DFT calculations of diacetylanthracenes, their σ-complexes, O-protonates, and O,O-diprotonates. The importance of kinetic control versus thermodynamic control in Friedel–Crafts acyl rearrangements is highlighted
1,5-,1,8-和9,10- diacetylanthracenes经历的Friedel-Crafts酰基在130-150℃下,在多磷酸重排,得到3-甲基苯基[ DE ]蒽-1-酮通过动力学控制的1, 9-二乙酰基蒽。重排机理由二乙酰基蒽,它们的σ络合物,O-质子酸酯和O,O-二质子酸酯的DFT计算支持。强调了动力学控制与热力学控制在Friedel-Crafts酰基重排中的重要性。还建议了某些可逆性特征。