1-(2,5-Dichlorobenzyl)-7-iodo-3,4-dihydro-1H-pyrido[2,3-b]pyrazine → 1-(2,5-Dichlorobenzyl)-1,2,3,4-tetrahydropyrido[2,3-b]pyrazine-7-carbonitrile

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Reaction Steps

1-(2,5-Dichlorobenzyl)-7-iodo-1,2,3,4-tetrahydropyrido[2,3-b]pyrazine (2.0 g) was reacted with CuCN as in General Procedure 6 to give the title compound as an off-white solid (46% yield). M.p. 221-222° C., LCMS: m/z=320.77 (M+H+), 1H-NMR (DMSO-d6, 400 MHz) δ 3.28 (t, J=4.6 Hz, 2H), 3.45-3.54 (m, 2H), 4.48 (s, 2H), 6.69 (s, 1H), 7.29 (d, J=2.5 Hz, 1H), 7.41 (dd, J=8.6 Hz, 2.5 Hz, 1H), 7.54 (d, J=8.6 Hz, 1H), 7.67 (bs, 1H), 7.75 (d, J=1.8 Hz, 1H).

Provenance & Evidence