4-[7-Bromo-2-(3-fluoro-2-methyl-benzyl)-3-phenyl-indolizine-1-carbonyl]-piperazine-1-carboxylic acid tert-butyl ester → [7-Bromo-2-(3-fluoro-2-methyl-benzyl)-3-phenyl-indolizin-1-yl]-piperazin-1-yl-methanone

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Reaction Steps

A solution of the compound of step 3 (70 mg, 115 μmol) in DCM (4 ml) and TFA (2 ml) was stirred at room temperature for 2 h. The solvents were evaporated and the resulting solid was purified by preparative HPLC. The fractions containing the title compound were combined and lyophilized overnight. The obtained solid was dissolved in a small quantity of MOH, mixed with 0.1 N hydrochloric acid and the mixture lyophilized overnight to give 15 mg of the title compound in the form of [7-bromo-2-(3-fluoro-2-methyl-benzyl)-3-phenyl-indolizin-1-yl]-piperazin-1-yl-methanone hydrochloride with the following characteristics:

Provenance & Evidence