Process for producing isocoumarins and intermediates for the...

C - Chemistry – Metallurgy – 07 – D

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C07D 311/76 (2006.01) C07C 67/343 (2006.01)

Patent

CA 2379981

Provided is a process for producing an isocoumarin-3-yl-acetic acid derivative, characterized by reacting a homophthalic acid derivative represented by formula (a): (wherein R c, R2 and R are mainly protecting groups) with a malonic acid derivating represented by formula (IV): (wherein R is an organic group including a lower alkyl group; R3 is a protecting group for a carboxyl group; and X is a halogen atom or a -OM group (wherein M is alkaline metal or alkaline earth metal)). According to the above process, various isocoumarin-3-yl-acetic acid derivatives can efficiently be provided.

L'invention concerne un procédé de production d'un dérivé d'acide isocoumarin-3-yl-acétique, consistant à faire réagir un dérivé d'acide homophtalique représenté par la formule F(a) (dans laquelle Rc, R2 et R représentent principalement des groupes protecteurs) avec un dérivé d'acide malonique représenté par la formule F (IV) (dans laquelle R représente un groupe organique comprenant un groupe alkyle inférieur, R3 représente un groupe protecteur destiné à un groupe carboxyle, et X représente un atome d'halogène ou un groupe -OM où M représente un métal alcalin ou un métal alcalino-terreux). Selon le procédé ci-dessus, on peut produire de manière efficace divers dérivés de l'acide isocoumarin-3-yl-acétique.

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