Trifluoroacetic acid → HCID 59741474, compound

Participants

Reaction Steps

A solution of 69 (0.25 g, 0.0005 mole) in 20 mL of 1:1 mixture of DCM and trifluoroacetic acid (TFA) was stirred at room temperature for 8 hours. The progress of the reaction was monitored by TLC. The reaction mixture was concentrated under reduced pressure. The residue was diluted with DCM (50 mL), washed with brine (25 mL), dried over sodium sulfate (Na2SO4) and evaporated. The residue was purified by 0-100% gradient of ethyl acetate and hexane as eluent to give the pure amine 70 as colorless oil in 85% (0.13 g) yield. 1H NMR (400 MHz, CDCl3): δ 0.85 (3H, broad s); 0.83 (3H, broad s); 1.25 (3H, t, J=4.5 Hz); 1.59 (1H, m); 1.85 (2H, m); 1.93 (2H, m); 2.20 (2H, m); 2.42 (2H, m); 2.68 (2H, m); 3.21 (1H, m); 4.08 (2H, q, J=4.5 Hz); 5.09 (2H, s); (6.81 (2H, broad d); 7.13 (2H, broad d).

Provenance & Evidence