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US 2024/0254067 A1Published application
Novel method for continuous pheromone production
AssigneeMelchior Material and Life Sciene France
InventorsOlivier GUERRET, Hugo LAUREANO
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Abstract
The invention relates to a novel method for synthesising aldehyde-terminated pheromones according to the reaction: Where R is a linear aliphatic chain of formula CnH2n−2P+i where n is a natural number greater than or equal to 9 and p is an integer between 1 and 4. This method is characterised in that it is carried out continuously in a polar solvent in the presence of a copper-based catalytic system under an air pressure of more than 1 bar and at a temperature of between 30 and 200° C.
Claims20
A method for preparing an aldehyde of general formula (II):
- wherein R is a linear hydrocarbon chain of formula CnH2n−2p+1,
- wherein:
- n is a natural number ranging from 9 to 24;
- p corresponds to the number of unsaturations of the hydrocarbon chain which is an integer ranging from 1 to 4;
- wherein the method is continuous and comprises the following concomitant steps:
- a) feeding a continuous reactor under an oxygen pressure of between 1 and 30 bar with:
- i) an alcohol of general formula (I):
- wherein R is as defined previously for the compound of formula (II), in solution in an apolar organic liquid phase (A) with a density strictly less than 0.7;
- ii) a copper-based catalyst in solution in a polar liquid phase (B) with a density greater than or equal to 0.75;
- the phases (A) and (B) being immiscible with each other,
- the alcohol/copper-based catalyst molar ratio ranging from 0.01 to 0.5;
- b) recovering the aldehyde in phase (A) by liquid/liquid separation.
9 more elements
Dependencies are inferred from the claim text.