Potassium Fluoride → 4-(4-Chloro-6-thiophen-3-yl-[1,3,5]triazin-2-yl)-piperazine-1-carboxylic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-(4,6-dichloro-[1,3,5]triazin-2-yl)-piperazine-1-carboxylic acid tert-butyl ester (167.1 mg, 0.5 mmol) in anhydrous 1,4-dioxane (4 mL) in an oven-dried flask was added 3-thiopheneboronic acid (70.4 mg, 0.55 mmol), Pd[P(t-Bu)3]2 (2.5 mg, 0.005 mmol), tris(dibenzylideneacetone)-dipalladium(0) (2.3 mg, 0.0025 mmol), and KF (64 mg, 1.1 mmol). The resulting mixture was vacuum flushed with argon and heated overnight at 90° C. The reaction mixture was cooled and passed through a pad of diatomaceous earth, washing with EtOAc. The filtrate was concentrated and the residue was purified by preparative TLC (EtOAc/hexanes, 1:4) to yield a white solid, which was used without further purification.

Provenance & Evidence