反应详情

To a solution of 3,4,6-trifluoro-2-methoxybenzaldehyde (Preparation 29, 0.118 g, 0.000280 mol) and potassium carbonate (0.097 g, 0.000702 mol) in dimethyl sulfoxide (3.5 mL) was added 4-chloro-3-(trifluoromethyl)phenol (0.0565 g, 0.000287 mol) portion wise. The reaction mixture was stirred at room temperature under nitrogen for 1 hour. The reaction was diluted with ethyl acetate (15.0 mL) and washed twice with water (10.0 mL). The organic layer was separated, dried with sodium sulphate, filtered and concentrated in vacuo. The residue was dissolved in iso-propyl acetate (3.0 mL) and methanesulfonamide (0.0226 g, 0.000238 mol) and bis(tert-butylcarbonyloxy)iodobenzene (0.145 g, 0.000375 mol) were added The mixture was stirred for 5 minutes before the addition of bis[rhodium(alpha, alpha, alpha′, alpha′-tetramethyl-1,3-benzenedipropionic acid)] (0.005 g, 0.00007 mol). The reaction was stirred at 55° C. under nitrogen for 2 hours. The solvent was concentrated in vacuo to afford a crude oil, which was purified using silica gel column chromatography eluting with 0-50% EtOAc in heptanes to furnish a solid. This was further triturated in heptane:acetone (9:1 mixture, 10.0 mL) to yield the title compound as a pale orange solid (0.025 g, 19%).

1. washwashed twice with water (10.0 mL)
2. customThe organic layer was separated
3. dry with materialdried with sodium sulphate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. dissolutionThe residue was dissolved in iso-propyl acetate (3.0 mL)
7. stirringThe reaction was stirred at 55° C. under nitrogen for 2 hours
8. concentrationThe solvent was concentrated in vacuo
9. customto afford a crude oil, which
10. customwas purified
11. washeluting with 0-50% EtOAc in heptanes
12. customto furnish a solid
13. customThis was further triturated in heptane:acetone (9:1 mixture, 10.0 mL)