1,1'-Biphenyl-4-yl-boronic acid → 1-(4(S)-benzyl-2,2-dimethyl-oxazolidinyl)-2-(4-biphenyl4-yl-pyrazol-1-yl)-ethanone

Participants

Reaction Steps

According to the procedure described in Example 1(a) for the preparation of 3-biphenyl-4-yl-furan, 1-(4(S)-benzyl-2,2-dimethyl-oxazolidinyl)-2-(4-iodopyrazol-1-yl)-ethanone was coupled to 4-biphenylboronic acid to provide in 39% yield 1-(4(S)-benzyl-2,2-dimethyl-oxazolidinyl)-2-(4-biphenyl-4-yl-pyrazol-1-yl)-ethanone as a white solid, mp 150-1° C. 1H NMR: δ 7.83 (s, 1H), 7.68 (s, 1H), 7.62-7.52 (m, 6H), 7.47-7.28 (m, 8H), 4.83, 4.38 (AB quartet, 2H, J=15.6 Hz), 4.22-4.18 (m, 1H), 3.94 (m, 2H), 3.09 (dd, 1H, J=6.4, 13.0 Hz), 2.97 (dd, 1H, J=8.5, 13.2 Hz), 1.79 (s, 3H), 1.55 (s, 3H). Anal. Calculated for C29H29N3O2 : C, 77.14; H, 6.47; N, 9.31. Found: C, 77.04; H, 6.52; N, 9.37.

Provenance & Evidence