Triethylamine → HCID 10239083, compound

Participants

Reaction Steps

Combine 3,3-Bis-[4-(tert-butyl-dimethyl-silanyloxy)-3,5-dimethyl-phenyl]-1,3-dihydro-indol-2-one (0.500 g, 0.831 mmol), 3-ethoxyphenylboronic acid (0.276 g, 1.66 mmol), copper (II) acetate (0.151 g, 0.831 mmol), triethylamine (0.23 mL, 1.66 mmol), 4 angstrom molecular sieves, and dichloromethane (20 mL). Stir at room temperature overnight under ambient atmosphere. Filter the reaction through Celite. Elute through a column of silica gel with 70% dichloromethane in hexanes and concentrate. Dissolve the resulting compound (0.603 g, 0.83 mmol), in THF (4 mL). Add a solution of tetrabutylammonium fluoride (1.0M) in THF (2.1 mL). Stir for 1 h. Quench with saturated aqueous ammonium chloride(10 mL), water (40 mL) and ethyl acetate (50 mL). Separate the layers and concentrate the organic layer in vacuo. Chromatograph on silica gel eluting with 25% to 50% ethyl acetate in hexanes to give 0.255 g (62%) of the title compound: mass spectrum (ion spray): m/z=494(M+1); 1H NMR(DMSO-d6); δ8.28 (s, 2H), 7.51 (t, 1H), 7.37 (d, 1H), 7.29 (td, 1H), 7.16 (td, 1h), 7.08-7.06 (m, 1H), 7.02-6.98 (m, 2H), 6.87 (d, 1H), 6.80 (s, 4H), 4.12 (q, 2H), 2.12(s, 12H), 1.38 (t, 3H).

Provenance & Evidence