Novel benzoheterocyclic ether derivative, preparation method thereof and application of novel benzoheterocyclic ether derivative in hypoglycemic drugs
A technology of benzoheterocyclic ethers and derivatives, applied in the field of drug synthesis
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Embodiment 1
[0029]
[0030] Synthesis of Intermediate 2:
[0031] Dissolve tert-butyl 4-aminothiocarbonyltetrahydropyridine-1(2H)-carboxylate (4.00g, 16.37mmol) in toluene, add 1,3-dichloroacetone (2.29g, 18.01mmol), and heat up to Reflux reaction, after 8h TLC detects that the reaction is complete, concentrate under reduced pressure to remove toluene, then add 100mL water, extract with 100mL ethyl acetate, wash the organic layer with saturated brine, Na 2 SO 4 Let dry overnight. The desiccant was filtered off, the solvent was distilled off under reduced pressure, and the residue was purified by silica gel column chromatography to obtain 4.22 g of the final product with a yield of 81.36%.
[0032] 1 H NMR (400MHz, DMSO-d 6 )δ: 7.64(s, 1H), 4.78(s, 2H), 4.22(t, J=6.5Hz, 2H), 3.22-3.19(m, 1H), 2.91(t, J=12.0Hz, 2H,) ,1.70(dt,J=12.0Hz,3.0Hz,2H),1.40(d,J=5.1Hz,9H).
[0033] Synthesis of Intermediate 3
[0034] Intermediate 2 (4.00g, 12.62mmol) and 5-hydroxybenzothiazole (1.91g, 12.6...
Embodiment 2
[0041]
[0042] 1 H NMR (400MHz, DMSO-d 6 )δ:9.23(s,1H),8.26(s,2H),7.64(s,1H),7.56–7.54(m,2H),7.01(d,J=8.0Hz,1H),5.21(s,2H ), 4.62(d, J=12.4Hz, 2H), 4.25-4.22(m, 1H), 3.06(t, J=12.0Hz, 2H), 2.41(q, J=7.9Hz, 2H), 2.13(d ,J=12.0Hz,2H),1.65-1.62(m,2H),1.14(t,J=7.6Hz,3H).ESI-MS m / z:438.1[M+H] + .
Embodiment 3
[0044]
[0045] 1 H NMR (400MHz, DMSO-d 6 ( d, J=11.0Hz, 2H), 4.24-4.20(m, 1H), 3.03(t, J=12.1Hz, 2H), 2.44(q, J=7.6Hz, 2H), 2.10(d, J=11.2 Hz,2H),1.64-1.62(m,2H),1.15(t,J=7.5Hz,3H).ESI-MS m / z:437.2[M+H] + .
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