N-bromobutanimide → 2-Propen-1-yl {5-[5-(2-chloro-4-pyrimidinyl)-2-(1,1-dimethylethyl)-1,3-thiazol-4-yl]-2-fluorophenyl}carbamate

To a solution of 2-propen-1-yl {5-[(2-chloro-4-pyrimidinyl)acetyl]-2-fluorophenyl}carbamate (35 g, 100.3 mmol in DMA, 500 mL), NBS (17.8 g, 100.3 mmol) was added. The reaction mixture was stirred at rt for 1 h. Then 2,2-dimethylpropanethioamide (13 g, 111 mmol) was added at 0° C. The mixture was stirred at 80° C. for 2 h. The mixture was poured into water and extracted with EtOAc (1 L×3). The combined organic layers were washed with water and brine successively, dried over Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by column chromatography on silica gel (DCM:petroleum ether 2:1) to afford the title compound (36 g, 80.5% yield). 1H NMR (400 MHz, CDCl3) δ ppm 8.24-8.31 (m, 2H), 7.09-7.18 (m, 2H), 7.01 (d, J=5.5 Hz, 1H), 6.92-6.98 (br, 1H), 5.87-5.97 (m, 1H), 5.31-5.37 (m, 1H), 5.24-5.28 (m, 1H), 4.61-4.65 (m, 2H), 1.46 (s, 9H).

1. stirringThe mixture was stirred at 80° C. for 2 h
2. extractionextracted with EtOAc (1 L×3)
3. washThe combined organic layers were washed with water and brine successively
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customto give the crude product, which
8. customwas purified by column chromatography on silica gel (DCM:petroleum ether 2:1)

ORDレコード

ord-5ed677f33dc24335890ed6d2159f01dd

出典データセット

uspto-grants-2013_04

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08415345B2