L-Leucine, N-((1,1-dimethylethoxy)carbonyl)- → Tert-butyl(s)-1-((3as,4r,6ar)-2-benzyloctahydrocyclopenta[c]pyrrol-4-ylamino)-1-oxopentan-2-yl(methyl)carbamate

Participants

Reaction Steps

The title compound was prepared by substituting N-(tert-butoxycarbonyl)-N-methyl-L-norvaline for N-(tert-butoxycarbonyl)-L-leucine and (3aS,4R,6aR)-2-benzyloctahydrocyclopenta[c]pyrrol-4-amine from Step E of Example 16 for (3aR,4S,6aS)-2-benzyloctahydrocyclopenta[c]pyrrol-4-amine in the procedure described in Example 221: 1H NMR (500 MHz, pyridine-d5, temperature 90° C.) δ ppm 7.36-7.38 (m, 2H), 7.28-7.31 (m, 3H), 7.21 (t, J=7.2 Hz, 1H), 4.70-4.79 (m, 1H), 4.23-4.29 (m, 1H), 3.57 (d, J=13.2 Hz, 1H), 3.47 (d, J=13.2 Hz, 1H), 2.95 (s, 3H), 2.77-2.81 (m, 1H), 2.48-2.52 (m, 1H), 2.39-2.46 (m, 2H), 2.36 (dd, J=9.0, 2.9 Hz, 1H), 2.30 (t, J=8.0 Hz, 1H), 2.07 (dq, J=12.1, 6.1 Hz, 1H), 1.92-2.03 (m, 1H), 1.72-1.86 (m, 2H), 1.50-1.59 (m, 1H), 1.47 (s, 9H), 1.36-1.44 (m, 1H), 1.25-1.35 (m, 2H), 0.86 (t, J=7.3 Hz, 3H); MS (ESI+) m/z 430 (M+H)+.

Provenance & Evidence