Acetic Acid → N2-(5-Ethynyl-2-isopropoxy-4-methyl-phenyl)-5-methyl-N4-[2-(propane-2-sulfonyl)-phenyl]-pyrimidine-2,4-diamine

Participants

Reaction Steps

A solution of N2-(2-Isopropoxy-4-methyl-5-trimethylsilanylethynyl-phenyl)-5-methyl-N4-[2-(propane-2-sulfonyl)-phenyl]-pyrimidine-2,4-diamine from the previous step (0.102 g, 0.18 mmol) in 2.5 mL THF is treated with TBAF (0.5 mL, 1M in THF) and 30 μL AcOH at 22° C. for 2 hrs. The reaction mixture is concentrated and the residue is purified using a 4 g SiO2 column (ISCO), affording N2-(5-Ethynyl-2-isopropoxy-4-methyl-phenyl)-5-methyl-N4-[2-(propane-2-sulfonyl)-phenyl]-pyrimidine-2,4-diamine (257). MS (ES+): 479.2 (MH+).

Provenance & Evidence