Water → tert-butyl (1-{4-[2-(1,3-thiazol-2-yl)-9H-imidazo[1,2-d]pyrido[2,3-b][1,4]benzodiazepin-3-yl]phenyl}cyclobutyl)carbamate

HRID 1047082Notes

Reaction equation

HRID 1047082 reaction equation
Br[C:2]1[N:3]=[C:4]2[C:10]3[CH:11]=[CH:12][CH:13]=[CH:14][C:9]=3[NH:8][C:7]3[N:15]=[CH:16][CH:17]=[CH:18][C:6]=3[N:5]2[C:19]=1[C:20]1[CH:25]=[CH:24][C:23]([C:26]2([NH:30][C:31](=[O:37])[O:32][C:33]([CH3:36])([CH3:35])[CH3:34])[CH2:29][CH2:28][CH2:27]2)=[CH:22][CH:21]=1.C([Sn](CCCC)(CCCC)[C:43]1[S:44][CH:45]=[CH:46][N:47]=1)CCC.O>COCCOC.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[S:44]1[CH:45]=[CH:46][N:47]=[C:43]1[C:2]1[N:3]=[C:4]2[C:10]3[CH:11]=[CH:12][CH:13]=[CH:14][C:9]=3[NH:8][C:7]3[N:15]=[CH:16][CH:17]=[CH:18][C:6]=3[N:5]2[C:19]=1[C:20]1[CH:25]=[CH:24][C:23]([C:26]2([NH:30][C:31](=[O:37])[O:32][C:33]([CH3:35])([CH3:34])[CH3:36])[CH2:27][CH2:28][CH2:29]2)=[CH:22][CH:21]=1

Participants

6

Reactant 3

HCID 962WaterHCID 27632592-(Tributylstannyl)-1,3-thiazoleHCID 136331865tert-butyl {1-[4-(2-bromo-9H-imidazo[1,2-d]pyrido[2,3-b][1,4]benzodiazepin-3-yl)phenyl]cyclobutyl}carbamate

Product 1

HCID 68067420tert-butyl (1-{4-[2-(1,3-thiazol-2-yl)-9H-imidazo[1,2-d]pyrido[2,3-b][1,4]benzodiazepin-3-yl]phenyl}cyclobutyl)carbamate

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
130 °C

Procedure

A mixture of tert-butyl {1-[4-(2-bromo-9H-imidazo[1,2-d]pyrido[2,3-b][1,4]benzodiazepin-3-yl)phenyl]cyclobutyl}carbamate (300 mg, 0.54 mmol), 2-(tributylstannyl)thiazole (337 μA, 1.1 mmol), and PdCl2(PPh3)2 (38 mg, 0.047 mmol) in 1,2-dimethoxyethane (10 ml) was added to a crimp top microwave vial, which was then sealed and heated under microwave irradiation conditions at 130° C. for 60 min. After cooling to room temperature the mixture was poured into water and extracted into ethyl acetate. The organic layers were washed with brine and dried over anhydrous Na2SO4. After filtration the solvent was evaporated in vacuo. The crude product was purified by silica gel chromatography (hexane/ethyl acetate; 0-100% ethyl acetate over 60 min) to give a yellow amorphous (quant.). 1HNMR (CDCl3) 400 MHz δ: 8.18 (1H, dd, J=7.7, 1.4 Hz), 8.02 (1H, d, J=4.0 Hz), 7.75 (1H, d, J=2.9 Hz), 7.44-7.37 (3H, m), 7.32 (1H, td, J=7.5, 1.7 Hz), 7.24 (1H, d, J=2.9 Hz), 7.15 (1H, td, J=7.4, 1.2 Hz), 6.97 (1H, d, J=8.0 Hz) 6.89-6.81 (1H, m), 6.61 (1H, dd, J=7.7, 4.9 Hz), 6.48 (1H, s), 5.18 (1H, s), 2.60-2.32 (4H, m), 2.17-2.08 (1H, m), 1.93-1.84 (1H, m), 1.48-1.21 (9H, m); LC/MS [M+H]: 563.

Workup

  1. additionwas added to a crimp top microwave vial, which
  2. customwas then sealed
  3. temperatureAfter cooling to room temperature the mixture
  4. extractionextracted into ethyl acetate
  5. washThe organic layers were washed with brine
  6. dry with materialdried over anhydrous Na2SO4
  7. filtrationAfter filtration the solvent
  8. customwas evaporated in vacuo
  9. customThe crude product was purified by silica gel chromatography (hexane/ethyl acetate; 0-100% ethyl acetate over 60 min)
  10. customto give a yellow amorphous (quant.)

Sources & evidence

ORD record
ord-9862ab71db274b11936cad3ffd315810
Source dataset
uspto-grants-2013_10
Patent number
US08569331B2

Reaction notes

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