Water → 6-Fluoro-5-(5-hydroxy-pent-1-ynyl)-2,3-dihydro-indole-1-carboxylic acid 4-chloro-phenyl ester

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Reaction Steps

A solution of 99 mg (0.45 mmol) 5-(6-Fluoro-2,3-dihydro-1H-indol-5-yl)-pent-4-yn-1-ol and 0.155 ml (0.90 mmol) N-Ethyldiisopropylamine in 2 ml CH2Cl2 was treated with 0.125 ml (0.90 mmol) 4-chlorophenyl chloroformate and stirred at room temperature during 1 hour. The mixture was poured into water, extracted with EtOAc and the combined organic layers were dried with MgSO4. Evaporation of the solvent, chromatography on silica gel with CH2Cl2/MeOH 49:1 gave 125 mg (74%) of 6-Fluoro-5-(5-hydroxy-pent-1-ynyl)-2,3-dihydro-indole-1-carboxylic acid 4-chloro-phenyl ester as a viscous light yellow oil, MS: 374 (MH+, 1Cl).

Provenance & Evidence