Triethylamine → 2-Methylalanyl-N-[(3R,4S,5S)-1-{(2S)-2-[(1R,2R)-3-{[2-(cyclohepta-2,4,6-trien-1-yl)ethyl]amino}-1-methoxy-2-methyl-3-oxopropyl]pyrrolidin-1-yl}-3-methoxy-5-methyl-1-oxoheptan-4-yl]-N-methyl-L-valinamide

Participants

Reaction Steps

To a solution of #65 (540 mg, 0.603 mmol, 1 eq.) in dichloromethane (10 mL, 0.06 M) was added triethylamine (10 mL) and the reaction mixture was stirred for 2 hours. The mixture was concentrated in vacuo and the residue was purified by silica gel chromatography (Gradient: 0% to 10% methanol in dichloromethane) to give #66 (347 mg, 85%) as a colorless solid. HPLC (Protocol A at 45° C.): m/z 674.5 [M+H+], retention time=7.015 minutes. 1H NMR (400 MHz, DMSO-d6), presumed to be a mixture of rotamers, characteristic signals: δ [8.03 (br d, J=9 Hz) and 8.05 (br d, J=9 Hz), total 1H], [7.77 (br dd, J=5.5, 5.5 Hz) and 7.98 (br dd, J=5.5, 5.5 Hz), total 1H], 6.54-6.65 (m, 2H), 6.10-6.19 (m, 2H), 5.11-5.19 (m, 2H), [4.48 (dd, J=9, 8 Hz) and 4.54 (dd, J=9, 7.5 Hz), total 1H], 3.94-4.04 (br m, 1H), 3.26 and 3.29 (2 s, total 3H), 3.17 and 3.19 (2 s, total 3H), 2.93 and 3.06 (2 br s, total 3H), 1.20 and 1.21 (2 s, total 3H), 1.12 and 1.13 (2 s, total 3H), [1.04 (d, J=6.8 Hz) and 1.07 (d, J=6.7 Hz), total 3H].

Provenance & Evidence