To a suspension of 2-(4-chloroquinazolin-2-yl)phenol (2.0 g, 7.79 mmol) in CH2Cl2 (25 mL) at 0° C. under an N2 atmosphere, was added dropwise tert-butyl piperidin-4-ylcarbamate (2.08 g, 10.13 mmol) and triethylamine (2.20 mL, 15.8 mmol) in CH2Cl2 (10 mL). The reaction was stirred overnight, quenched with water and extracted with CH2Cl2, and the combined organic layers were dried over MgSO4, filtered, and concentrated to afford tert-butyl 1-(2-(2-hydroxyphenyl)quinazolin-4-yl)piperidin-4-ylcarbamate (3.27 g, 100%—solvent residue). LC/MS: m/z 421.3 (M+H)+ at 2.70 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA))
