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Chemical Structure| 903522-17-8 Chemical Structure| 903522-17-8

Structure of 903522-17-8

Chemical Structure| 903522-17-8

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Product Details of [ 903522-17-8 ]

CAS No. :903522-17-8
Formula : C8H8BrNS
M.W : 230.12
SMILES Code : S=C(C1=CC=C(C)C(Br)=C1)N
MDL No. :MFCD30158763

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Application In Synthesis of [ 903522-17-8 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 903522-17-8 ]

[ 903522-17-8 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 42872-74-2 ]
  • [ 903522-17-8 ]
YieldReaction ConditionsOperation in experiment
With hydrogen sulfide; ammonia; In ethanol; at 20℃; for 4h; 2,6-Difluoro-N-[2'-methyl-5'-(4-methyl-thiazol-2-yl)-biphenyl-4-yl]-benzamide A solution of <strong>[42872-74-2]3-bromo-4-methyl-benzonitrile</strong> (500 mg, 2.55 mmol) in ammonia solution (2 M in ethanol, 10 mL) was bubbled with H2S gas slowly for 1 hr. The solution was stirred for 3 hr at room temperature before the nitrogen was bubbled through the solution to remove H2S. The solution was concentrated to give the crude s (450 mg) which was used directly in the next reaction. The solution of s (100 mg, 0.43 mmol) and 1-chloropropan-2-one (200 muL, 2.5 mmol) in ethanol (2 mL) was refluxed at 85 C. for 10 hr. The solvent was removed and column chromatography afforded t (60 mg, 52%). Compound 38 was obtained by a Suzuki coupling reaction analogous to that described for Compound 20. 1H NMR (300 MHz, CDCl3) delta 7.93 (s, 1H), 7.80-7.68 (m, 4H), 7.40-7.29 (m, 4H), 7.03-6.96 (m, 2H), 6.82 (s, 1H), 2.48 (s, 3H), 2.31 (s, 3H); ESMS cacld (C24H18F2N2OS): 420.1; found: 421.1 (M+H).
With hydrogen sulfide; ammonia; In methanol; for 12h; To a solution of h (2 g) in methanol (100 ml) containing NH3 (3 eq) was bubbled with H2S for 2 hr, after standing for another 10 hr, the solvent was evaporated to give crude j, which was used directly for the next step. Alternatively, j can be prepared as follows. To a stirred suspension of i (10 g) in benzene (700 ml) was added lawesson's reagent (20 g). The reaction was refluxed for 8 min in 100 C. oil bath. The mixture was filtered with silica gel funnel, and eluted with CH2Cl2/EtOAc (1:1), and subjected to silical gel column chromatography (5:1 Hexanes:Ethyl acetate) to give j (5.3 g). To a stirred solution of j (5.3 g) in THF (anhydrous, 50 ml) was added bromoacetaldehyde diethyl acetal (10 ml). The mixture was refluxed and followed by TLC to determine when the reaction had gone to completion. After 24 hrs, the solvents were evaporated and the residue was purified with silica gel column chromatography to give k (3.5 g). To a stirred suspension of k (2.5 g) in toluene (500 ml) was added 1 (3.4 g), dichlorobis(triphenylphosphine)-palladium(II) (1.6 g), 1M Na2CO3 (7.5 ml), and ethanol (12.5 ml). The reaction mixture was stirred at 115 C. for 10 hours (check by TLC). After being cooled to room temperature, the mixture was directly applied to silica gel column chromatography to give compound 14 (3.1 g). 1H-NMR (CD3Cl) delta (ppm), 8.53(s, 1H), 8.49(d, J=4.2, 1H), 8.11(s, 1H), 7.82-7.22(m, 10H), 2.50 (s, 3H), 2.32(s, 3H). ESMS clcd for C23H19N3OS: 385.12; Found: 386.1. (M+H)+.
 

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