反应详情

A mixture of 6,7-dimethoxy-4-piperidin-4-yl-quinazoline (18.8 mg, 68.9 μmol), as prepared in Example 1d, and (4-isopropyl-phenyl)-carbamic acid 4-nitro-phenyl ester 21.3 mg, 71.0 μmol), as prepared in the preceding step, was stirred in CH3CN (250 μL) at 80° C. for 4 h. The reaction was then partitioned with DCM (4 mL) and 1 M K2CO3 (4 mL), and the organic layer was dried (Na2SO4) and concentrated under reduced pressure. Flash chromatography of the residue (EtOAc) provided the title compound (21.5 mg, 72%). 1H-NMR (300 MHz, CDCl3) δ 9.08 (s, 1H), 7.34 (s, 1H), 7.31-7.25 (m, 3H), 7.16 (m, 2H), 6.37 (br s, 1H), 4.32-4.22 (m, 2H), 4.07 (s, 3H), 4.06 (s, 3H), 3.60 (tt, 1H), 3.18 (td, 2H), 2.87 (heptet, 1H), 2.24-2.08 (m, 2H), 2.04-1.94 (m, 2H), 1.23 (d, 6H). LC/MS (ESI): calcd mass 434.2, found 435.3 (MH)+.

1. customas prepared in the preceding step
2. customThe reaction was then partitioned with DCM (4 mL) and 1 M K2CO3 (4 mL)
3. dry with materialthe organic layer was dried (Na2SO4)
4. concentrationconcentrated under reduced pressure