반응 #1328646

반응 방정식

5-[(3S)-3-(4-chlorophenyl)-4-[(R)-1-(4-chlorophenyl)ethyl]-7-iodo-2,5-dioxo-3,4-dihydro-1H-1,4-benzodiazepin-1-yl]valeric acid tert-butyl ester

triethylamine

methanol

DMF

→

title compound

수율 83.0%

5-[(3S)-3-(4-chlorophenyl)-4-[(R)-1-(4-chlorophenyl)ethyl]-7-methoxycarbonyl-2,5-dioxo-3,4-dihydro-1H-1,4-benzodiazepin-1-yl]valeric acid tert-butyl ester

수율 83.0%

반응 조건

후처리

1. 1
   기타the solvent was evaporated under reduced pressure
2. 2
   기타The crude reaction product
3. 3
   기타was purified by column chromatography on silica gel (EtOAc/hexanes, 1:2)

실험 절차

A solution of 5-[(3S)-3-(4-chlorophenyl)-4-[(R)-1-(4-chlorophenyl)ethyl]-7-iodo-2,5-dioxo-3,4-dihydro-1H-1,4-benzodiazepin-1-yl]valeric acid tert-butyl ester (300 mg, 0.42 mmol), dichloro bis-(triphenylphosphine)Pd(II) (21 mg, 0.030 mmol), and triethylamine (200 μL, 1.43 mmol), in DMF (4 mL) and methanol (1.5 mL) was stirred under a carbon monoxide atmosphere at 80° C. for 24 h. After the solution was cooled to room temperature, the solvent was evaporated under reduced pressure. The crude reaction product was purified by column chromatography on silica gel (EtOAc/hexanes, 1:2) to give the title compound (226 mg, 83%): 1H NMR (400 MHz, CDCl3) δ 1.45 (s, 9H, 3 CH3), 1.58–1.62 (m, 2H, CH2), 1.75 (d, J=5.4 Hz, 3H, CH3), 2.24 (t, J=10.5 Hz, 2H, CH2), 3.62–3.90 (m, 3H, 3 CH), 3.91 (s, 3H, CH3), 4.23–4.31 (m, 1H, CH), 5.34 (s, 1H, CH), 6.45 (q, J=5.4 Hz, 1H, CH), 6.50 (d, J=6.3 Hz, 2H, ArH), 6.84 (d, J=6.3 Hz, 2H, ArH), 6.94 (d, J=6.6 Hz, 1H, ArH), 7.32 (d, J=6.6 Hz, 2H, ArH), 7.50 (d, J=6.3 Hz, 2H, ArH), 7.84 (dd, J=6.3 Hz, J=1.5 Hz, 1H, ArH), 8.33 (d, J=1.5 Hz, 1H, ArH).

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