[C:1]([N:5]1[CH2:27][CH2:26][CH2:25][CH2:24][C:8]2[C:9]([Cl:23])=[C:10]3[C:19]4[CH:18]=[C:17](Br)[C:16]([O:21][CH3:22])=[CH:15][C:14]=4[CH2:13][CH2:12][N:11]3[C:7]=2[C:6]1=[O:28])([CH3:4])([CH3:3])[CH3:2].[N:29]1[CH:34]=[CH:33][CH:32]=[C:31](B(O)O)[CH:30]=1.C([O-])([O-])=O.[K+].[K+].C(COC)OC>O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:1]([N:5]1[CH2:27][CH2:26][CH2:25][CH2:24][C:8]2[C:9]([Cl:23])=[C:10]3[C:19]4[CH:18]=[C:17]([C:31]5[CH:30]=[N:29][CH:34]=[CH:33][CH:32]=5)[C:16]([O:21][CH3:22])=[CH:15][C:14]=4[CH2:13][CH2:12][N:11]3[C:7]=2[C:6]1=[O:28])([CH3:4])([CH3:3])[CH3:2]A mixture of 65 mg of 19e, 25 mg of 3-pyridine-boronic acid, 45 mg of K2CO3 and 12 mg of Pd(PPh3)4 in 3 ml of degassed 90% aq. dimethoxyethane was heated under a nitrogen atmosphere for 16 h at 90° C. The mixture was diluted with water, extracted with ethyl acetate, dried and concentrated. The residues were purified by chromatography over silica gel, using a gradient of heptane/ethyl acetate as eluent. The material thus obtained was triturated with pentane, to provide 45 mg of white crystalline 19f; Mp: 190-192° C. MS-ESI: [M+1] 464.17, 465.17 and 466.17. NMR (CDCl3) δ 1.58 (s, 3, tertC4H9), 1.62-1.77 (bm, 2, CH2), 1.80-2.05 (bm, 2, CH2), 2.60-2.77 (bm, 2, CH2), 2.970-3.18 (bm, 2, CH2), 3.50 bm, 1, CH), 3.76-3.92 (bm, 2, CH2), 3.86 (s, 3, OCH3), 4.50 (bm, 1, CH), 6.87 (s, 1, ArH), 8.20 (s, 1, ArH), 7.36, 7.89, 8.57, 8.83 (4×m, 4, pyridine-H).
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