Potassium Carbonate → (R)-benzyl 5-((4-(hydroxymethyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)methyl)-2,3-dihydro-1H-inden-2-ylcarbamate

Participants

Reaction Conditions

Reaction Steps

(R)-benzyl-5-(hydroxymethyl)-2,3-dihydro-1H-inden-2-ylcarbamate (5.08 mmol, 1.51 g) was dissolved in DCM (20 mL), thionyl chloride (10.16 mmol, 0.741 mL, 1.208 g) added and the resultant solution stirred at room temperature for 45 min. The sample was concentrated and azeotroped with DCM (×4). Potassium carbonate (15.23 mmol, 2.105 g) was added followed by DMF (20 mL) and (3-(trifluoromethyl)-1H-pyrazol-4-yl)methanol (5.08 mmol, 0.843 g) and the mixture heated to 60° C. for 1 h. The mixture was concentrated and partitioned between EtOAc/water. The aqueous layer was twice extracted with EtOAc and combined organics dried, filtered and concentrated to give a yellow oil which was purified on silica eluting with 0.5% MeOH/DCM to give (R)-benzyl 5-((4-(hydroxymethyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)methyl)-2,3-dihydro-1H-inden-2-ylcarbamate as a light coloured oil (1.74 g, 77%). 1H NMR (400 MHz, CDCl3) δ 1.83 (t, 1H) 2.79 (m, 2H) 3.27 (m, 2H) 4.52 (bs, 1H) 4.64 (d, 2H) 4.99 (bs, 1H) 5.09 (bs, 2H) 5.25 (s, 2H) 7.05-7.11 (m, 2H) 7.19 (m, 1H) 7.26-7.40 (m, 6H).

Provenance & Evidence