反应详情

1.4M BuLi (600 μL, 0.84 mmol) was added to ethyl 1-[5-[7-bromo-2-(3-ethyl-5-methyl-2-oxo-1,3,5-triazinan-1-yl)-1,3-benzothiazol-5-yl]pyrimidin-2-yl]-4-ethyl-piperidine-4-carboxylate (250 mg, 0.41 mmol) in THF (10 mL) at −90° C. and the reaction stirred for 10 mins before DMF (300 μL) was added and the mixture stirred for a further 20 mins. The reaction was quenched with sat. NH4Cl (aq) then allowed to warm to rt before extraction with EtOAc (3×). Combined EtOAc extracts were dried and the solvent evaporated to yield the crude product which was purified by flash chromatography on 12 g SiO2 using EtOAc/Cyclohexane gradient 0-0% 3CV, 0-100% 20CV, 100-100% 5CV to yield the desired product (105 mg, 46%). 1H NMR (CDCl3) δ 10.22 (s, 1H), 8.63 (s, 2H), 8.06 (d, J=1.7 Hz, 1H), 7.83 (d, J=1.7 Hz, 1H), 5.21 (s, 2H), 4.56 (dt, J=13.8, 3.5 Hz, 2H), 4.33 (s, 2H), 4.23 (q, J=7.1 Hz, 2H), 3.51 (q, J=7.2 Hz, 2H), 3.23-3.13 (m, 2H), 2.67 (s, 3H), 2.25 (bd, J=13.4 Hz, 2H), 1.61 (q, J=7.6 Hz, 2H), 1.45 (ddd, J=13.5, 11.9, 4.2 Hz, 2H), 1.30 (t, J=7.1 Hz, 3H), 1.25 (t, J=7.2 Hz, 3H), 0.86 (t, J=7.5 Hz, 3H).

1. additionwas added
2. customThe reaction was quenched with sat. NH4Cl (aq)
3. dry with materialCombined EtOAc extracts were dried
4. customthe solvent evaporated
5. customto yield the crude product which
6. customwas purified by flash chromatography on 12 g SiO2