Toluene → Methyl 6-chloro-5-(4-(1-hydroxy-2-methylpropan-2-yl)-3-methoxyphenyl)-1H-indole-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-(4-bromo-2-methoxyphenyl)-2-methylpropan-1-ol (crude product from Step 4, containing 40% of the desired material, 75 mg, 0.12 mmol), methyl 6-chloro-5-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)-1H-indole-3-carboxylate (45 mg, 0.14 mmol), PdCl2(dppf) (11 mg, 0.013 mmol), potassium carbonate (80 mg, 0.58 mmol), toluene (0.6 mL), ethanol (0.3 mL), water (0.3 mL), and THF (0.3 mL) was stirred at 115° C. for 2.5 hours. The reaction mixture was cooled to room temperature and extracted with ethyl acetate (4 mL) of ethyl acetate. The extract was loaded on silica gel. Chromatography on a silica gel column, eluting with a gradient from 10% to 40% of ethyl acetate in heptane gave the title compound (25 mg, 56% yield). MS (ES−) 386.2 (M−H)−. Retention time: 3.38 min. Column: Phenomenex Gemini-NX, 4.6 mm×50 mm, C18, 3 μm, 110A; Column Temperature 60° C. Mobile Phase A: 0.1% formic acid in water (v/v); Mobile Phase B: 0.1% formic acid in acetonitrile (v/v) Gradient Profile: Flow-1.5 mL/min. Initial conditions: A-95%, B-5%; Linear Ramp to A-0%, B-100% over 0.0-4.10 min; hold at A-0%, B-100% from 4.10-4.50 min; return to initial conditions 4.60-5.0 min.

Provenance & Evidence