Diboron → HCID 10670600, compound

Participants

Reaction Steps

A 1.0M solution of diborane in THF (6.65 ml) was added to a solution of 5-acetamido-N-(5-bromo-3-methoxy-2-pyrazinyl)-1-naphthalenesulphonamide (0.725 g) in dry THF (60 ml) at 0° C. under argon. The solution was heated under reflux for 24 hours and then volatile material was removed by evaporation. The residue was purified by flash chromatography, eluting with ethyl acetate/hexane (7:13 v/v), to give 5-ethylamino-N-(5-bromo-3-methoxy-2-pyrazinyl)-1-naphthalenesulphonamide (0.23 g), m.p. 216°-218° C. (after trituration with ether); 1H NMR (d6 -DMSO): 1.3 (t,3H), 3.25 (q,2H), 3.9 (s,3H), 6.6 (d,1H), 7.4-7.6 (m,2H), 7.75 (s,1H), 7.95 (d,1H), 8.25 (d,1H), 8.5 (d,1H), 11.3-11.5 (br, 1H); mass spectrum (+ve FAB, methanol/NBA): 438 (M+H)+.

Provenance & Evidence