[Br:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[CH2:12][CH:11]([CH2:13][OH:14])[O:10][N:9]=2)=[N:6][CH:7]=1.C(N(CC)CC)C.[CH3:22][S:23](Cl)(=[O:25])=[O:24].C(=O)(O)[O-].[Na+]>ClCCl>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[CH2:12][CH:11]([CH2:13][O:14][S:23]([CH3:22])(=[O:25])=[O:24])[O:10][N:9]=2)=[N:6][CH:7]=1[3-(5-Bromo-pyridin-2-yl)-4,5-dihydro-isoxazol-5-yl]-methanol (38.8 g, 150.5 mmol) was added to anhydrous dichloromethane (200 ml) followed by addition of triethylamine (29.2 ml, 210.7 mmol). The solution was cooled to 0° C. followed by dropwise addition of methane sulfonyl chloride (12.3 ml, 180.6 mmol). The reaction was stirred for 2 hours at 0° C. and then aqueous sodium bicarbonate (100 ml) was added. After further extraction with dichloromethane (2×100 ml), the organic layers were combined, dried over sodium sulfate, and concentrated in vacuo to give the desired product (30.5 g).
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