Potassium Phosphate, Tribasic → 2-[3-Pyridin-2-ylethynyl-1-(2-trimethylsilanyl-ethoxymethyl)-1H-indazol-6-ylamino]-benzoic acid methyl ester

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Reaction Conditions

Reaction Steps

A mixture of 3-Pyridin-2-ylethynyl-1-(2-trimethylsilanyl-ethoxymethyl)-1H-indazol-6-ylamine (560 mg, 1.54 mmol), 2-bromomethylbenzoate (647.5 μL, 4.61 mmol), biphenyl-2-yl-dicyclohexyl-phosphane (107.8 mg, 0.308 mmol), Pd2(dba)3 (70.5 mg, 0.0768 mmol), K3PO4 (816 mg, 3.844 mmol), and dimethoxyethane (1.7 ml), were vacuum flushed with nitrogen, then heated in an oil bath at 70 degrees C. for 24 h. The black mixture was diluted with methylene chloride, and filtered, concentrated, and chromatographed (20% to 40% ethylacetate/hexanes). Yield of yellow/orange oil was 260 mg, 35% for three steps.

Provenance & Evidence