Rapid Reaction Of α-Pinene With Alcohol, Carboxylic Acid Under Microwave Irradiation

In this paper,the author used a -pinene as material in the experiment,whichwas produced by the Jian forestry chemical factory in Jiangxi province .By researched some kinds of addition reactions of -pinene with carboxylic acid , methanol under microwave irradiation,the author studied many factors on the reactions and got the optimum process conditions.Microwave irradiation was used as an kind of heating means in addition reaction of a -pinene and methanol,and the optimun experiment factors are as follows: 0.03 mol of a -pinene ,0.12 mol of methanol, 1.34 10-3mol of sulfuric acid (catalyst), 70W of the microwave power, and 100 min of the reaction time.By means of GC, GC-MS, GC-IR, IR, H1-NMR,the reaction products were investigated and the results showed that there are camphene, limoneneN terpinolene, Me a -fenchyl ether, Me -terpinyl ether, Me bornyl ether and Me isobornyl ether containing in the products,and the content of the main product Me a -terpinyl ether is up to 42.5%,the selectivity is 44.7%. Compared with reported papers and comparative experiment,the reactions under microwave irradiation not only have 5 times reaction velocity than that of comparative reactions,but have better productivity and selectivity.Microwave irradiation was used in addition reaction of a -pinene and formic acid ,which was deposed in a cooling environment,and the optimun experiment factors are as follows: O.OSmol of a -pinene, O.lSmol of formic acid, 7 .14 10-4mol of sulfuric acid(catalyst) , 700W of the microwave power, 40 min of the reaction time. By means of GC, GC-MS, GC-IR, the reaction products were investigated and the results showed that there are triylene, camphene, limonene, p-cymene, terpinolene -terpinene, -terpinene, -fenchyl formate, linalyl formate, terpinyl formate, bornyl formate and isobornyl formate containing in the products,and linalyl formate was first discovered in addition reaction of a -pinene and formic acid .The content of the main product terpinyl formate is up to 60.4%,the selectivity is 64.5%. Compared with comparative experiment,the reactions under microwave irradiation have rapid reaction velocity , better productivity and selectivity.This paper studied addition reaction of a -pinene with alcohol(formic acid)under microwave irradiation. The enhancement of significant reaction velocity and the reduction of the reaction time were observed through those addition reaction,and the main product yield was improved. It not only supplied a new evidence in microwave irradiation enhancing reaction rate ,but also provide a new approch in making and a reliable scientific basis for industrialization producing.