Methanesulfonic acid, aminoimino- → HCID 178512793, compound

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Reaction Steps

A solution of 2-(2-carboxyethyl)-8-(5-aminopentynyl)-2,3,4,5-tetrahydro-1H-2-benzazepin-1-one trifluoroacetate (20 mg, 0.063 mmol) in saturated aqueous KHCO3 (1 mL) was treated with formamidine sulfonic acid (80 mg, 1.0 mmol), and the resulting mixture stirred for 2 hours. The mixture was then treated with acetic acid, and the volatiles were removed. The residue was purified by HPLC (1/2' C-18 reverse-phase column) eluting with a gradient of 3:7 methanol (0.1% trifluoroaceate)/water (0.1% trifluoroaceate), time 0 to 10 min, to 7:3 methanol(0.1% trifluoroaceate)/water(0.1% trifluoroaceate), time 10 to 40 min, to yield 4.5 mg (15%) of 2-(2-carboxyethyl)-8-(5-guanidinopentynyl)-2,3,4,5-tetrahydro-1H-2-benzazepin-1 -one trifluoroacetate as a light brown solid; 1H NMR(D2O) d7.40(s, 1H), 7.25(dd, J=3, 6 Hz, 1H), 7.15(d, J=6 Hz, 1H), 3.80(t, J=6 Hz, 2H), 3.30(m, 4H), 3.15(t, J=6 Hz, 2H, 2.00(t, J=6 Hz, 2H), 1.80(m, 2H); MS(FAB) m/z=357.1(MH+).

Provenance & Evidence