3-BROMO-4-CHLORO-BENZALDEHYDE

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Warning

• 유해·위험 문구

  H315：피부에 자극을 일으킴

  H319：눈에 심한 자극을 일으킴

  H335：호흡 자극성을 일으킬 수 있음

• 예방조치문구

  P261：분진·흄·가스·미스트·증기·...·스프레이의 흡입을 피하시오.

  P305+P351+P338：눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.

3-BROMO-4-CHLORO-BENZALDEHYDE 화학적 특성, 용도, 생산

• 용도

  3-BROMO-4-CHLORO-BENZALDEHYDE can be used as organic synthesis intermediate and pharmaceutical intermediate, mainly used in laboratory research and development process and chemical production process.

• Synthesis

  
  The product from above (3.4 g, 22 mmol) in concentrated 48% aqueous HBr (20 mL) at 0 ??C was treated with a 0 ??C solution of NaNO2 (1.5 g, 22 mmol) in water (30 mL). The reaction mixture was stirred for 30 min and then transferred cold to a stirred solution of CuBr (4.44 g, 31 mmol) in 48% aqueous HBr (20 mL) at 23 ??C (significant frothing!). Water (40 mL) was added, the solution was heated at 60 ??C for 45 min, cooled, diluted with EtOAc (200 mL) and water (50 mL), and the layers were separated. The aqueous layer was extracted with EtOAc (2x, 50 mL). The organic layers were combined, washed with 1 M HCl (2x, 100 mL) and brine (50 mL), dried (Na2SO4), filtered, and concentrated to provide 3-bromo-4-chlorobenzaldehyde as a pale yellow powder (3.9 g, 82%). 3-Bromo-4-chlorobenzaldehyde, yield 3.9 g, 82%

3-BROMO-4-CHLORO-BENZALDEHYDE 준비 용품 및 원자재

3-BROMO-4-CHLORO-BENZALDEHYDE 공급 업체

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