Water → Tert-butyl 6-((6-amino-5-(4-phenoxyphenyl)pyrimidin-4-yl)amino)-2-azaspiro[3.3]heptane-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

In a microwave vial containing 6-(6-Amino-5-chloro-pyrimidin-4-ylamino)-2-aza-spiro[3.3]heptane-2-carboxylic acid tert-butyl ester (828.00 mg; 2.44 mmol; 1.00 eq.) in dioxane (4.00 ml; 46.94 mmol; 19.27 eq.) and water (0.40 ml; 22.20 mmol; 9.11 eq.) was added cesium carbonate (1190.86 mg; 3.65 mmol; 1.50 eq.), palladium(II) acetate (27.35 mg; 0.12 mmol; 0.05 eq.), 4-phenoxyphenylboronic acid (651.87 mg; 3.05 mmol; 1.25 eq.) and 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (100.03 mg; 0.24 mmol; 0.10 eq.). The reaction mixture was stirred at 140° C. for 16 h before it was concentrated and separated on a 50 g silica gel column with gradient EtOAc/Hexane (0-100%). The fractions were concentrated and carried to the next step.

Provenance & Evidence