Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1) → HCID 178520839, compound

Participants

Reaction Steps

203 mg (1.0 mmol) of 3-tert-butoxycarbonylamino-3-cyclopropyl-propionic acid (0.23 g, 1 mmol) was reacted with 380 mg (1.0 mmol) of HBTU and 130 mg (1.0 mmol) of 2-aminoimidazole sulfate as described in general procedure A. The desired amide product was isolated by column chromatography (EtOAc/silica) and carried on directly to the next step. The BOC compound in DCM (3 mL) was treated with 4.0 M HCl/dioxane (15 mL) for approximately 1 h. The solid 3-Amino-3-cyclopropyl-N-(1H-imidazol-2-yl)-propionamide (180 mg, 100%) was collected by filtration and used directly in the next step 289 mg (1 mmol) of 2-isoquinolin-3-yl-1H-benzoimidazole-5-carboxylic acid (289 mg, 1 mmol) was reacted with 380 mg (1 mmol) of HBTU and 3-amino-3-cyclopropyl-N-(1H-imidazol-2-yl)-propionamide (230 mg, 1 mmol) as described in general procedure A. A solid precipitated from the solution and was collected by filtration, washed with 1H2O and Et2O, to give 2-isoquinolin-3-yl-1H-benzoimidazole-5-carboxylic acid [1-cyclopropyl-2-(1H-imidazol-2-ylcarbamoyl)-ethyl]-amide (20 mg, 4%). LCMS: 466 (M+1)+. 1H NMR (DMSO-d6, 400 MHz): δ 9.20 (s, 1H), 8.56 (s, 1H), 8.09-7.34 (m, 9H), 6.39 (s, 2H), 3.71 (t, 1H), 2.44 (m, 2H), 0.81 (m, 1H), 0.10 (m, 4H) ppm.

Provenance & Evidence