Process of preparation of substituted...

Details Process of preparation of substituted... Process of preparation of substituted...

2006-05-25

2009-02-24

Puttlitz, Karl J (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C562S433000, C562S440000

Reexamination Certificate

active

07495126

ABSTRACT:
This invention relates to a method for preparing tetrafluorobenzyl-5-aminosalicylic acid derivative and its pharmaceutically acceptable salt compounds. In particular, this invention relates to a method for preparing tetrafluorobenzyl-5-aminosalicylic acid derivative and its pharmaceutically acceptable salts by using tetrafluorobenzilidine-5-aminosalicylic acid derivative as an intermediate.

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Derdau, V., et al., “Condensation of Laterally Lithiatedo-Methyl ando-Ethyl Benzamides with Imines Mediated by (−) Sparteine, Enantioselective Synthesis of Tetrahydroisoquinolin-1-ones,” J. Org. Chem. 2001, 66, 1992-1998.
Andrews, Philip, C., et al., “Gallium metal mediated allylation of carbonyl compounds and imines under solvent-free conditions,” Tetrahedron Letters, 45 (2004) 243-248.

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