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Chemical Structure| 885223-63-2 Chemical Structure| 885223-63-2

Structure of 885223-63-2

Chemical Structure| 885223-63-2

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Product Details of [ 885223-63-2 ]

CAS No. :885223-63-2
Formula : C8H8BrClN2O2
M.W : 279.52
SMILES Code : O=C(N(OC)C)C1=C(Cl)N=CC(Br)=C1
MDL No. :MFCD16159813

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Application In Synthesis of [ 885223-63-2 ]

* 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 [ 885223-63-2 ]

[ 885223-63-2 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 885223-63-2 ]
  • [ 228251-24-9 ]
YieldReaction ConditionsOperation in experiment
45% With lithium aluminium tetrahydride; In tetrahydrofuran; at -10 - 20℃; Preparation of S-bromo^-chloronicotinaldehyde (D-2-3).To a stirred solution of compound D-2-2 (25 g, 89.4 mmol) in dry THF (200 mL) was added LiAIH4 (1.7 g, 27 mmol) at -10 0C under N2 atmosphere. After the addition, the reaction mixture was allowed to warm up to room temperature and stirred overnight. TLC (petroleum ether/EtOAc 5:1 ) indicated complete consumption of starting material. To the reaction mixture was added 1 N KHSO4 (200 mL) and extracted with EtOAc (300 mL><3). The combined organic layers were washed with saturated aqueous NaCI (200 mL), dried over Na2SO4 and concentrated in vacuo to yield crude compound D-2-3, which was purified by column chromatography (silica gel, petroleum ether/EtOAc 30:1 ) to yield pure compound D-2-3 (8.0 g, 45%) as a white solid.
With diisobutylaluminium hydride; In dichloromethane; at -78 - 0℃; for 0.5h; To a solution of 5-bromo-2-chloro-N-methoxy-N-methylnicotinamide (E-i) (11.8 g, 42 mmol) in CDM (250 mL) was added DIBA1-H (70 mL, 105 mmol) at -78C, and the mixture was stirred at 0C for 0.5 h. The reaction solution was concentrate and the residue was purified by column chromatography on silica gel eluting with PE/EtOAc (10:1) to give 5-bromo-2-chloronicotinaldehyde (E-2). MS-ESI (m/z): 220 [M + 1].
 

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