Trifluoroacetic acid → (+/-)-{3-Chloro-6-[(4-fluoro-benzenesulfonyl)-methyl-amino]-5,6,7,8-tetrahydro-2,4b-diaza-fluoren-9-yl}-acetic acid methyl ester

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Reaction Steps

To a solution of (±)-{3-chloro-6-[(4-fluoro-benzenesulfonyl)-methyl-amino]-5,6,7,8-tetrahydro-2,4b-diaza-fluoren-9-yl}-oxo-acetic acid methyl ester (0.006 g) in 0.2 mL of CH2Cl2 were added 0.2 mL of TFA and 0.2 mL of Et3SiH. The reaction mixture was stirred overnight at r.t. and concentrated under vacuum. The residue was purified by silica gel chromatography eluted with 50% EtOAc/hexane to give 0.005 g desired product as a white solid. MS (ESI): 466.1. (M+1).

Provenance & Evidence