C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 309/30 (2006.01)
Patent
CA 2571379
The present invention relates to an improved and industrial friendly process for lactonization to produce compound of the Formula [I], from compound of the Formula [II] in presence of an inorganic compound as a suitable lactonizing agent, preferably alkali metal hydrogen sulfate, and crystallizing the obtained lactone product in a solvent; or treating compound of the Formula [II] in the presence of an inorganic compound preferably alkali metal hydrogen sulfate using phase transfer catalyst in heterogeneous phase followed by crystallizing the obtained lactone product in a solvent.
La présente invention concerne un processus industriel écologique amélioré de lactonisation intervenant dans la fabrication d'un composé de formule [I] à partir d'un composé de formule [II] en présence d'un composé inorganique en tant qu'agent de lactonisation approprié, de préférence un acide sulfurique de métal alcalin, et de cristallisation du produit lactone ainsi obtenu dans un solvant . L'invention concerne également le traitement du composé de formule [II] en présence d'un composé inorganique, de préférence un acide sulfurique de métal alcalin au moyen d'un catalyseur de transfert de phase en phase hétérogène suivi d'une cristallisation du produit lactone obtenu dans un solvant.
Bhadwal Paramvir
Dubey Sushil Kumar
Jaiswal Sanjay
Khanna Jag Mohan
Panchasara Dinesh R.
Jubilant Organosys Limited
Marks & Clerk
LandOfFree
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