Abstract:
Disclosed are methods for the continuous flow production of acrylic acid and derivatives thereof from an epoxide feedstock. In one embodiment, the method includes the steps of: contacting a process stream comprising ethylene oxide and an organic solvent with a carbonylation catalyst and carbon monoxide to provide a reaction stream containing beta propiolactone; applying the reaction stream containing the beta propiolactone to a nanofiltration membrane to produce a permeate stream containing beta lactone and a retentate stream containing carbonylation catalyst; and treating the permeate stream under conditions to convert the beta propiolactone into an acrylate ester. In some embodiments, the retentate stream is returned to the first step of the process where it is recharged with additional epoxide and passed through the sequence again.
Abstract:
The present invention relates to the field of organic synthesis and more particularly to a new process for the preparation of a compound of formula (I), in the form of any one of its isomers or a mixture thereof, Formula (I) wherein, more preferably, G represents a C=O group, R 1 represents a butyl group and R 2 represents a methyl group. The process of the invention involves an 2-(1-hydroxyalkyl)-cyclopent-2-en-1-one derivative, as starting material, which can be then converted into a compound of formula (I) by a process comprising a thermal rearrangement. The 2-alkylidene-3-oxo-cyclopentylacetate derivative and the 2-(1-hydroxyalkyl)-cyclopent-2-en-1-one derivative are also an object of the invention.
Abstract:
Beschrieben wird die Verwendung einer Verbindung der Formel (Ia) oder (Ib), wobei in jeder der Formeln (Ia) und (Ib), R 1 H oder Methyl und R 2 eine verzweigte oder unverzweigte C 1 - bis C 5 -Alkylgruppe ist, als Jasmin-Riechstoff.
Abstract:
The present invention concerns acontinuous-flow process for the production of allyl compounds by deoxydehydration of glycerol comprising the following steps: (a)Forming a reactive solution by mixing glycerol (1) with: a carboxylic acid (2), and/or a triethyl orthoester, preferably triethyl orthoformate (TEOF); (b)Feeding the reactive solution to an inlet of a channel of a thermolysis microreactor module wherein the channel has an inner hydraulic diameter, D=4A/P, wherein A is the area and P the perimeter of a cross-section of the channel, of not more than 1000µm, (c)Exposing the reactive solution to thermolysis by driving a flow of the reactive solution along the channel from the inlet to an outlet, for a thermolysis time, t, at a pressure, P, and at a thermolysis temperature, T, larger than 200°C, to form thermolysis products including at least one allyl compound; and Recovering the thermolysis products at the outlet and separating the at least one allyl compound from the other thermolysis products
Abstract:
Process for the synthesis of olefinically unsaturated carboxylic acid esters of the formula R 1 R 2 C=CR 3 (COOR 4 ), in which R 1 is an alkyl, aryl or heteroaryl group that may be substituted with one or more halogen atoms and/or C 1 -C 3 -alkyl groups, R 2 is an alkyl, aryl or heteroaryl group that may be substituted with one or more halogen atoms and/or C 1 -C 3 -alkyl groups, or hydrogen, or R 1 and R 2 form together with the carbon atom connecting them a C 4 -C 7 -carbocyclus that may be substituted with one or more halogen atoms and/or C 1 -C 3 -alkyl groups, R 3 is hydrogen or a C 1 -C 5 -alkyl group, and R 4 is an alkyl or aryl group with up to 20 carbon atoms, by reacting in a first step a carbonyl compound of formula R 1 R 2 C=O with an orthoester of formula CH 2 R 3 C(OR 4 ) 3 , and by dehydrating in a second step the obtained intermediate compound R 1 R 2 COH- CHR 3 (COOR 4 ).