Cesium carbonate → tert-butyl 4-((5-(2-(4-chloro-3-methoxyphenyl)propan-2-yl)-1-(4-fluorophenyl)-1H-imidazol-2-ylthio)methyl)-3,5-difluorobenzoate

Participants

Reaction Steps

A mixture of 5-(2-(4-chloro-3-methoxyphenyl)propan-2-yl)-1-(4-fluorophenyl)-1H-imidazole-2-thiol (60 g, 0.16 mmol), tert-butyl 3,5-difluoro-4-((methylsulfonyloxy)methyl)benzoate (51 g, 0.16 mol, 1.0 eq.) and Cs2CO3 (62 g, 0.19 mol, 1.2 eq.) in MeCN (680 mL) was stirred for 2 h and evaporated to give a residue. The residue was diluted with water (1.5 L) and extracted with CH2Cl2 (1 L). The organic layer was washed with brine, dried over MgSO4, filtered and concentrated in vacuo to give tert-butyl 4-((5-(2-(4-chloro-3-methoxyphenyl)propan-2-yl)-1-(4-fluorophenyl)-1H-imidazol-2-ylthio)methyl)-3,5-difluorobenzoate (95 g, quant). 1H NMR (400 MHz, CDCl3) δ 7.40-7.42 (d, 2H), 7.19 (s, 1H), 7.14-7.16 (d, 1H), 6.76-6.80 (t, 2H), 6.51 (s, 1H), 6.41-6.49 (m, 3H), 4.07 (s, 2H), 3.75 (s, 3H), 1.58 (s, 9H), 1.47 (s, 6H).

Provenance & Evidence