Patent ID: 9254341
Filing Date: 2016-02-09
CPC Classification: A61K,A61P,C07D,G01N

Claim Text:
1. A method for synthesizing a compound of the formula: or a racemic mixture thereof, wherein: X is selected from the group consisting of: or a racemic mixture thereof; and Y is represented by the formula: wherein: R R comprising the steps of: (a) reacting a compound of the formula 1:  with a compound of the formula:  or a racemic mixture thereof,  in the presence of a polar solvent and trifluoroacetic acid to provide a compound of the formula:  or a racemic mixture thereof; (b) reacting the compound of the formula:  or a racemic mixture thereof;  with sodium hydroxide and a dye compound of the formula:  wherein:  R  R (c) isolating the compound of the formula:  or a racemic mixture thereof,  wherein:  R  R