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1. WO2022003710 - A PROCESS FOR THE PREPARATION OF VANILLIN AND OTHER SUBSTITUTED PHENYLALDEHYDES

Publication Number WO/2022/003710
Publication Date 06.01.2022
International Application No. PCT/IN2021/050495
International Filing Date 21.05.2021
IPC
C07C 45/27 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
45Preparation of compounds having C=O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
27by oxidation
C07C 47/00 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
47Compounds having -CHO groups
Applicants
  • COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH (AN INDIAN REGISTERED BODY INCORPORATED UNDER THE REGN. OF SOC. ACT (ACT XXI OF 1860)) [IN]/[IN]
Inventors
  • GUPTA, Atul
  • VERMA, Ram Swaroop
  • SINGH, Sarita
  • SINGH, Swati
  • NEGI, Arvind Singh
  • SHANKER, Karuna
  • TANDON, Sudeep
  • KALRA, Alok
Agents
  • LAKSHMIKUMARAN, Malathi
  • RAE, Konpal
  • PHILLIPS, Prashant
  • PANDEYA, Jaya
  • SRINIVASAN, T.
Priority Data
20201102834503.07.2020IN
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A PROCESS FOR THE PREPARATION OF VANILLIN AND OTHER SUBSTITUTED PHENYLALDEHYDES
(FR) PROCÉDÉ DE PRÉPARATION DE VANILLINE ET D'AUTRES PHÉNYLALDÉHYDES SUBSTITUÉS
Abstract
(EN) The present invention relates to a chemical process for the production of substituted phenylaldehydes such as vanillin (1a) from substituted phenylpropenes or substituted phenylpropenes enriched essential oils such as eugenol (2a) or eugenol rich essential oils indiscriminately through either cis or trans or a mixture of cis and trans isomer(s) of substituted phenylprop-2-enes such as isoeugenol, an intermediate compound. The invention relates to the conversion of substituted phenylpropenes to other substituted phenylaldehydes, particularly vanillin without the protection of the phenolic group, therefore, it offers a step economy. The present chemical process involves the use of class 3 and 4 solvents thereby devoid of the use of any chlorinated solvent.
(FR) La présente invention concerne un procédé chimique pour la production de phénylaldéhydes substitués tels que la vanilline (1a) à partir de phénylpropènes substitués ou de phénylpropènes substitués enrichis en huiles essentielles telles que l'eugénol (2a) ou des huiles essentielles riches en eugénol par l'intermédiaire de cis ou de trans ou d'un mélange d'isomères cis et trans de phénylprop-2-enes substitués tels que l'isoeugénol, un composé intermédiaire. L'invention concerne la conversion de phénylpropènes substitués en d'autres phénylaldéhydes substitués, en particulier de la vanilline sans la protection du groupe phénolique, ce qui offre une économie d'étapes. Le procédé chimique selon l'invention implique l'utilisation de solvants de classe 3 et 4 dépourvus ainsi de l'utilisation de tout solvant chloré.
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