Patent · US Active

Process for preparing benzo[1,2-b;4,5-b′]dithiophene-4,8-dicarboxylic acid or its 2,3-dihydro derivative

US9216994B2 · kind B2 · utility

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1References

7Claims

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Assignee

Merck Patent GmbH · DE

Inventor

Eva Kriegbaum · Darmstadt, DE

Key dates

Filing date	Feb 25, 2013
Grant date	Dec 22, 2015
Priority date	—
Expiry date	Feb 25, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D405/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for preparing benzo[1,2-b;4,5-b′]dithiophene-4,8-dicarboxylic acid or its 2,3-dihydro derivative, and to novel products prepared by this process.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.