Trifluoroacetic acid → methyl (1S)-2-methyl-1-({2-[4-(2-pyridinyl)benzyl]hydrazino}carbonyl)propylcarbamate

Participants

Reaction Conditions

Reaction Steps

A solution of Example 4B (0.18 g, 0.6 mmol) in dichloromethane:trifluoroacetic acid (4 mL, 1:1) was stirred at 25° C. for 1 h, and the solvents were evaporated. This material was dissolved in THF (1 mL) and treated with diisopropylethyl amine (0.31 mL, 3 equivalents), DEPBT (0.36 g, 2 equivalents), and Example 18A (0.105 g, 1 equivalent), stirred at 25° C. for 3 h. The mixture was partitioned between dichloromethane and 10% sodium carbonate, the organic layer was separated, washed with brine, dried over sodium sulfate, filtered and the solvents were evaporated. The crude residue was purified using 2% methanol/chloroform to give 0.1 g (47%) of the title compound.

Provenance & Evidence