Ammonium Chloride → HCID 68907678, compound

Participants

Reaction Steps

Methyllithium (1.14N solution, 2.27 ml) was added to a tetrahydrofuran solution (10 ml) of (1R*,2S*,4R*)-N2-tert-butoxycarbonyl-N1-[(5-chloroindol-2-yl)carbonyl]-4-ethoxycarbonyl-1,2-cyclohexanediamine (200 mg) at −78° C., and the mixture was stirred for 1 hour and then 2 hours under ice cooling. An aqueous solution of ammonium chloride was added to the reaction mixture to extract the reaction mixture with chloroform, and the resultant organic layer was washed with saturated saline and then dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the residue was purified by column chromatography on silica gel (hexane:ethyl acetate=1:3) to obtain the title compound (115 mg) as a colorless solid.

Provenance & Evidence