关键词:

高温液态水, 二氧化碳, 重排反应, 频那醇, 频那酮

Abstract:

An environmentally benign method to accelerate the pinacol rearrangement in high temperature liquid water by the addition of CO₂ was proposed.The effects of CO₂ initial pressure and temperature on the kinetics of pinacol rearrangement were studied.The experimental results showed that the reaction rate could be greatly increased with the addition of CO₂.The activation energies evaluated were 81.1 kJ·mol^-1 without CO₂, and 87.1 kJ·mol^-1 with CO₂ initial pressure at 0.2 MPa, which showed no significant difference.The main by-product was confirmed to be 2,3-dimethyl-3-butadiene by GC/MS and the possible reaction mechanism was proposed.

Key words:

高温液态水, 二氧化碳, 重排反应, 频那醇, 频那酮