Process for the optical resolution of pyranobenzoxadiazole...

C - Chemistry – Metallurgy – 07 – D

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260/298.2

C07D 498/04 (2006.01)

Patent

CA 2021337

ABSTRACT OF THE DISCLOSURE A process for the optical resolution of a pyranobenzoxadiazole compound represented by the formula [(+)I]: Image ( (?) I) which comprises reacting the compound [(?)I] with an optically active carboxylic acid represented by the formula [II]: Image (II) and separating the diastereomeric salt thus formed is disclosed.

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