5-Fluoro-2-methylpyridine

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Warning

• 유해·위험 문구

  H227：가연성 액체

  H302：삼키면 유해함

  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.

5-Fluoro-2-methylpyridine 화학적 특성, 용도, 생산

• Synthesis

  5-Amino-2-methyl pyridine (2.8 g, 25.9 mmol) was added to a mixture of water (15 mL) and cone. HCl (7 mL) and cooled to 0°C. NaNO2 (3.5 g, 51.8 mmol) was added portion-wise with stirring over 10 min whilst keeping the reaction temperature between -5℃ and O℃. After stirring for 10 min 60 % w/w HPF6 (14 mL) was added dropwise with cooling, at which point a precipitate formed. This was filtered, washed with cold water and diethyl ether and dried. The solid was then heated slowly to 100℃; the reaction being very exothermic. After 5 min a dark red oily material formed which was then cooled to r.t. The oil was basifed with dilute sodium hydroxide to pH ~10 and extracted with dichloromethane. The combined organics were dried over sodium sulfate, filtered and evaporated in vacuo. The residue was purified by column chromatography over neutral alumina using 20 % dichloromethane-petroleum ether to yield 5-fluoro-2- methyl pyridine (1.57 g, 55%) as an oil.

5-Fluoro-2-methylpyridine 준비 용품 및 원자재

5-Fluoro-2-methylpyridine 공급 업체

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