EP 4359376 A1 20240501 - PRODUCTION PROCESS FOR 1,2-ALKANEDIOLS AND COMPOSITIONS CONTAINING 1,2-ALKANEDIOLS
Title (en)
PRODUCTION PROCESS FOR 1,2-ALKANEDIOLS AND COMPOSITIONS CONTAINING 1,2-ALKANEDIOLS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON 1,2-ALKANDIOLEN UND 1,2-ALKANDIOLHALTIGE ZUSAMMENSETZUNGEN
Title (fr)
PROCÉDÉ DE PRODUCTION DE 1,2-ALCANEDIOLS ET COMPOSITIONS CONTENANT DES 1,2-ALCANEDIOLS
Publication
Application
Priority
- EP 21181248 A 20210623
- EP 2022066838 W 20220621
Abstract (en)
[origin: WO2022268786A1] The current invention relates to a process for the production of 1,2-alkanediols comprising the steps of: providing a dialkyl oxalate (component A); providing an ester or an aldehyde (component B), which is characterised by having at least one hydrogen atom bound to the second (alpha-)carbon atom; reaction of the dialkyl oxalate (component A) with an ester or aldehyde (component B) in the presence of a base (component C), thereby forming at least one new carbon-carbon bond and obtaining an intermediate; conversion of the obtained intermediate to an alpha-keto carboxylic acid, an alpha-keto ester or a mixture thereof; optionally, esterification of the obtained alpha-keto carboxylic acid; reduction of the alpha-keto carboxylic acid or its ester to the corresponding 1,2-alkanediol; and optionally, purification of the obtained 1,2-alkanediol and/or any of the intermediates formed during the prior steps.
IPC 8 full level
C07C 67/32 (2006.01); C07C 29/147 (2006.01); C07C 31/20 (2006.01); C07C 69/738 (2006.01)
CPC (source: EP)
C07C 29/147 (2013.01); C07C 67/32 (2013.01)
C-Set (source: EP)
Citation (search report)
See references of WO 2022268786A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2022066838 W 20220621; EP 22735852 A 20220621