1. Catalyzed transesterification reaction to prepare n-butyl cinnamate
CN201210026469.3 provides a method for preparing n-butyl cinnamate by catalyzing transesterification reaction, which is a method for transesterification of methyl cinnamate and n-butanol catalyzed by microwave synergistic 1-butyl-3-methylimidazolium bisulfate ionic liquid The method for preparing n-butyl cinnamate by reaction. The object of the present invention is achieved through the following technical solutions:
A method for preparing n-butyl cinnamate by catalyzed transesterification, comprising the following steps: adding methyl cinnamate, catalyst 1-butyl-3-methylimidazolium bisulfate and n-butanol in a microwave reaction tank, fully Mix well to obtain the reaction raw materials; the molar ratio of methyl cinnamate and n-butanol is 1:6 to 1:16; the reaction raw materials are irradiated with microwaves for 5 to 60 minutes, the microwave power is set to 100 to 500W, and the microwave irradiation temperature Set at 70-117°C, and obtain n-butyl cinnamate after microwave irradiation.
The present invention adopts the novel process of synthesizing n-butyl cinnamate through the transesterification reaction of methyl cinnamate and n-butanol catalyzed by microwave synergy with 1-butyl-3-methylimidazolium bisulfate ionic liquid, which has high heating efficiency and short reaction time Short, low energy consumption, simple process, easy after-treatment, recyclable catalyst and environmental friendliness, it is a new energy-saving green chemical method in line with sustainable development and environmental friendliness, especially in our country today Under the situation of severe energy shortage, it has better prospects for industrialization.
2. For the preparation of agricultural compositions
Methyl cinnamate is a common root exudate, which was often treated as an allelochemical or other functional substance before, and the research on its ecological function in soil is very lacking. CN201810427224.9 has proved that methyl cinnamate has a good nitrification inhibitory effect through pure bacterial culture and soil addition tests, can be used as a biological nitrification inhibitor, and has a good nitrification inhibitory effect.
CN201810427224.9 gives an agricultural make-up. The raw product components of the agricultural composition are 40g of urea, 2g of methyl cinnamate, 10g of hygroscopic fragments, and also 10g of binder; the active ingredients are blended with each other, compressed, Dry as well as granulate. Compared to previous art, the helpful effect of the present development is:
( 1) The expense is reduced. In the development, methyl cinnamate is used as a nitrification inhibitor for controling soil N conversion, and also is utilized in an agricultural structure for maintaining plant foods; the farming structure prepared by the method has less manufacturing investment, steady product quality, as well as is easy to take care of.
( 2) Compared with the existing nitrification prevention DMPP etc., the present development has the advantages of easy synthesis approach, large source of raw materials and reduced cost.
( 3) The application impact is excellent. The nitrification inhibitor given by the invention can be used to maintain plant foods, and after being related to soil, N improvement can be properly controlled.