(R)-Tetrahydrofuran-2-carboxylic acid (193 mg, 1.66 mmol) was dissolved in DMF (6 mL), followed by the addition of HATU (696 mg, 1.83 mmol). The mixture was then stirred for 15 min at room temperature under an N2 atmosphere. The 2-[4-(4-Amino-piperidin-1-yl)-7-methyl-quinazolin-2-yl]-phenol (556 mg, 1.66 mmol) was dissolved in DMF (8 mL) and added to the mixture, followed by triethylamine (336 mg, 0.463 mL, 3.32 mmol). After 30 min, the DMF was removed in vacuo and the crude product partitioned between water and ethyl acetate. The aqueous layer was separated, washed with ethyl acetate, and the combined organic layers dried over MgSO4, filtered, and concentrated to give crude product as an orange oil. Purification via silica gel chromatography (20% ethyl acetate/80% 1:1 CH2Cl2:hexane) gave pure (R)-Tetrahydro-furan-2-carboxylic acid {1-[2-(2-hydroxy-phenyl)-7-methyl-quinazolin-4-yl]-piperidin-4-yl}-amide (303 mg, 42%). 1H NMR (400 MHz, DMSO-d6) δ 8.44 (dd, J=8.2, 1.5 Hz, 1H), 7.90 (d, J=8.5 Hz, 1H), 7.75 (d, J=8.3 Hz, 1H), 7.67 (s, 1H), 7.40-7.36 (m, 2H), 6.97-6.93 (m, 2H), 4.48-4.45 (m, 2H), 4.20 (dd, J=8.2, 5.3 Hz, 1H), 4.06-3.96 (m, 1H), 3.88 (dd, J=14.3, 6.6 Hz, 1H), 3.74 (dd, J=14.5, 6.7 Hz, 1H), 3.43-3.32 (m, 2H), 2.51 (s, 3H), 2.16-2.07 (m, 1H), 1.89-1.69 (m, 7H). 13C NMR (100 MHz, DMSO-d6) δ 171.7, 162.8, 160.7, 159.5, 149.3, 144.1, 132.5, 129.0, 127.3, 125.7, 125.4, 118.9, 118.4, 117.2, 111.9, 77.6, 68.5, 48.3, 45.5, 31.3, 31.2, 30.0, 24.9, 21.2.
