EP 4313961 A1 20240207 - PROCESS FOR PREPARING POLYCYCLIC ODORANTS
Title (en)
PROCESS FOR PREPARING POLYCYCLIC ODORANTS
Title (de)
HERSTELLUNGSVERFAHREN FÜR POLYCYCLISCHE RIECHSTOFFE
Title (fr)
PROCÉDÉ DE PRÉPARATION D'ODORISANTS POLYCYCLIQUES
Publication
Application
Priority
EP 2021058820 W 20210403
Abstract (en)
[origin: WO2022207123A1] A process is proposed for preparing compounds of formula (I), (I) where the respective radicals in the compound of formula (I) are as follows: R1, R2, R3 and R4 each independently denote hydrogen, methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, isobutyl, acetyl, formyl or cyano, comprising or consisting of the following steps: (A) etherification of a phenol derivative to obtain an allyl ether derivative; (B) Claisen rearrangement and subsequent cyclization of the ether from step (A); (C) acetylation or formylation of the intermediate from step (B), with steps (A) and (B) being effected in a one-pot reaction.
IPC 8 full level
C07D 307/79 (2006.01)
CPC (source: EP KR)
C07D 307/79 (2013.01 - EP KR)
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)
WO 2022207123 A1 20221006; CN 117062807 A 20231114; EP 4313961 A1 20240207; JP 2024514789 A 20240403; KR 20230165314 A 20231205
DOCDB simple family (application)
EP 2021058820 W 20210403; CN 202180096362 A 20210403; EP 21716426 A 20210403; JP 2023560851 A 20210403; KR 20237037773 A 20210403