A kind of compound and its synthesis method and mosquito repellent spray

A synthesis method and compound technology, applied in the field of chemistry, can solve the problems of strong odor of essential oils, and the inability to guarantee the mosquito repellent effect and duration, etc., and achieve the effect of short reaction time, long mosquito repellent effect, and simple preparation process

Active Publication Date: 2021-08-06
清远市立道精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In higher concentrations, in the presence of volatile propellants, the smell of essential oils in sprays is particularly unacceptably loud
[0008] If the concentration is small, although the smell is somewhat controlled, the mosquito repellent effect and duration cannot be guaranteed

Method used

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  • A kind of compound and its synthesis method and mosquito repellent spray
  • A kind of compound and its synthesis method and mosquito repellent spray
  • A kind of compound and its synthesis method and mosquito repellent spray

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 6-bromo-3, the synthesis of 7-dimethyl octanol, concrete method is as follows:

[0039] Step 1: In a reactor with a reflux device, under the protection of an inert gas, mix citronellol, solvent benzene, and azobisisobutylcyanide and raise the temperature to 76±2°C;

[0040] Step 2: Slowly feed HBr gas into the system of step 1, feed HBr gas for 40 minutes, and then react at constant temperature for 80 minutes;

[0041] Step 3: The distillate obtained by distillation under reduced pressure at 50° C. is 6-bromo-3,7-dimethyloctanol, namely preparation 1.

[0042] The dosage of each substance is as follows:

[0043] Citronellol: 15.6g; HBr: 10.9g; Benzene: 125g; Azobisisobutylcyanide: 0.09g.

Embodiment 2

[0045] 6-bromo-3, the synthesis of 7-dimethyl octanol, concrete method is as follows:

[0046] Step 1: In a reactor with a reflux device, under the protection of an inert gas, mix citronellol, solvent benzene, and azobisisobutylcyanide and raise the temperature to 76±2°C;

[0047] Step 2: Slowly feed HBr gas into the system of step 1, feed HBr gas for 30 minutes, and then react at constant temperature for 60 minutes;

[0048] Step 3: The distillate obtained by distillation under reduced pressure at 50° C. is 6-bromo-3,7-dimethyloctanol; that is, preparation 2.

[0049] The dosage of each substance is as follows:

[0050] Citronellol: 15.6g; HBr: 10.5g; Benzene: 150g; Azobisisobutylcyanide: 0.15g.

[0051] Citronellol, boiling point 225°C;

[0052] 6-Bromo-3,7-dimethyloctanol, the measured boiling point is 239.2°C.

Embodiment 3

[0054] Preparation of mosquito repellent spray:

[0055] The propellant and the alcohol solution are filled into a spray bottle, wherein the weight of the propellant is 60%, and the weight of the alcohol solution is 40%; the spray 1 is obtained.

[0056] In the alcoholic solution is preparation 1 prepared as in Example 1, the filling amount is 5% of the weight of the alcoholic solution, and the balance is ethanol.

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Abstract

The invention discloses a compound, which is 6-bromo-3,7-dimethyloctanol. It belongs to the field of chemistry. The compound uses citronellol as a raw material. After bromination, because its boiling point increases by about 15°C, its odor is relatively small, and its odor is more mellow after bromination. In the presence of propellants It will not cause discomfort to the human body, it is easy to wash off after staying on the skin, and the retention time is long before washing off. The invention also provides a preparation method of the compound and a mosquito repellent spray.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a compound, a synthesis method thereof and a mosquito repellent spray. Background technique [0002] In the field of mosquito repellent, citronella extract and wormwood extract are very commonly used extracts, as can be seen in: [0003] CN109125200A discloses a mosquito repellent liquid, its raw material components include: 2-5 parts of citronellal plant extract, 1-3 parts of geranium plant extract, 0.5-2 parts of peppermint oil, wormwood 0.3-0.8 parts of extract, 1-2 parts of Smilax smilax, 1-3 parts of perilla leaf extract, 3-7 parts of deionized water, and 0.1-0.4 parts of borneol. [0004] CN106719932A discloses a method for preparing a mosquito repellent liquid based on citronella grass, comprising the following steps: (1) drying the citronella grass, cutting the roots and stems into 1 cm size, then mixing the roots, stems and leaves evenly and adding them to a casserole, Add 1:2...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C07C29/62C07C31/36A01N25/06A01N31/02A01P17/00
CPCA01N25/06A01N31/02C07C29/62C07C31/36
Inventor杨春林魏斌
Owner清远市立道精细化工有限公司