2 июля, 2015 
Malyar Hydrogenation of the less expensive a-pinene gives pinane, which can be oxidized by air under radical conditions to give the hydroperoxide, which is then reduced to pinan-2-ol. Pyrolysis of this alcohol gives linalool, as shown in Scheme 4.3. This process is operated by Glidco at their plant in Georgia in the USA.
The disadvantage of this process lies in a side reaction. Linalool is not stable under the pyrolysis conditions and some of it undergoes an ene reaction to give a mixture of isomeric alcohols, known as plinols. These have boiling points close to that of linalool, making separation
i, 02
ii, H2/catalyst
by distillation difficult. The pyrolysis is therefore run at below total conversion to minimize plinol formation. The mechanism of the ene reaction and the structure of the plinols are shown in Scheme 4.4.
Опубликовано в рубрике 