MTBE acetone water → HCID 178487476, 화합물

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Following the general nucleophilic carbamoylation procedure, tranexamic acid (6.9 g, 43.9 mmol) and 1-[(2,5-dioxopyrrolidinyl)oxycarbonyloxy]ethyl (2S)-2-[6-methoxy(2-naphthyl)]propanoate (ca. 6.2 g, 14.9 mmol) were reacted in the MTBE/acetone/water mixture (160 mL) to yield the title compound 27 (579 mg, 9% yield) as a colorless powder after work-up, purification by silica gel column chromatography using ethyl acetate/hexane mixtures from 2:1 to 4:1 as eluent, and subsequent mass-guided preparative HPLC. 1H NMR (400 MHz, DMSO-d6): δ=0.76-0.94 (m, 2H), 1.10-1.92 (m, 13H), 1.98-2.14 (m, 1H), 2.66-2.86 (m, 2H), 3.82-3.95 (m, 4H), 6.64-6.76 (m, 1H), 7.10-7.17 (m, 1H), 7.24-7.50 (m, 3H), 7.63-7.80 (m, 3H), 11.99 (br.s, 1H). MS (ESI) m/z 480.16 (M+Na)+; 456.18 (M−H)−.

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