反应详情

(S)-1-[(2S,3R)-2-((S)-2-{(E)-4-[2-((R)-1-Acetoxy-ethyl)-quinolin-7-yl]-2,2-dimethyl-but-3-enoylamino}-3-methyl-butyrylamino)-3-(tert-butyl-diphenyl-silanyloxy)-butyryl]-hexahydro-pyridazine-3-carboxylic acid 2,2,2-trichloro-ethyl ester (444 mg, 0.440 mmol) was taken up in a mixture of tetrahydrofuran (10 mL) and water (3 mL) and cooled using an ice bath. Lithium hydroxide monohydrate (148 mg, 3.52 mmol) was then added and the reaction was allowed to slowly warm to room temperature and left to stir for eighty minutes. The solution was then neutralised with hydrochloric acid (2 M) and concentrated until all volatiles had been removed to afford the title compound (368 mg, 100%) as a yellow solid. 1H NMR (300 MHz, CD3OD) δ 0.83 (d, J=6.5 Hz, 3H), 0.87-93 (m, 7H), 0.96 (s, 9H), 1.16-1.61 (m, 13H), 1.63-1.81 (m, 2H), 2.10-2.23 (m, 2H), 2.26-2.33 (m, 1H), 2.64-2.76 (m, 1H), 3.98-4.21 (m, 3H), 4.86 (d, J=11.8 Hz, 1H), 5.08 (d, J=9.6 Hz, 1H), 6.81 (ABq, Δδ=0.17, JAB=16.2 Hz, 2H), 7.13-7.19 (m, 1H), 7.22-7.29 (m, 1H), 7.32-7.47 (m, 6H), 7.52-7.63 (m, 4H), 7.72-8.12 (m, 3H). LCMS (m/z) 836.6 [M+H], Tr=3.03 min.

1. temperaturecooled
2. waitleft
3. concentrationconcentrated until all volatiles
4. customhad been removed