Potassium Phosphate, Tribasic → 7-(3-Difluoromethylphenyl)-isoquinoline-5-sulfonic acid (2-amino-ethyl)-amide

Participants

Reaction Conditions

Reaction Steps

Dissolve [2-(7-bromo-isoquinoline-5-sulfonylamino)-ethyl]-carbamic acid tert-butyl ester (0.13 g, 0.30 mmol) and 3-(difluoromethyl)phenylboronic acid (0.057 g, 0.33 mmol) in DME-methanol (8:1, 10 ml). To the mixture, add K3PO4 (0.13 g, 0.60 mmol), and PdCl2(dppf) (0.012 g, 0.015 mmol). Heat this mixture at 82° C. overnight. Cool the reaction mixture, dilute with water and extract with EtOAc. Wash with brine and evaporate to dryness. Purify by silica gel chromatography to give the desired compound (0.10 g, 71% yield): 1H NMR (CDCl3): δ9.39 (s, 1H), 8.66 (m, 2H), 8.43 (d, J=5.7 Hz, 2H), 7.86 (m, 2H), 7.61 (m, 2H), 6.76 (t, J=52.1 Hz, 1H), 5.00 (br s, 1H), 3.18 (m, 2H), 3.03 (m, 2H), 1.37 (s, 9H); ESIMS: m/z 478 (M+H)+.

Provenance & Evidence