Ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate

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.

  P304+P340：흡입하면 신선한 공기가 있는 곳으로 옮기고 호흡하기 쉬운 자세로 안정을 취하시오.

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

  P405：밀봉하여 저장하시오.

Ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate 화학적 특성, 용도, 생산

• 용도

  Ethyl 2-(4-Hydroxyphenyl)-4-methylthiazole-5-carboxylate is used in the synthesis of the major metabolites of Febuxostat (F229000), a xanthine oxidase/xanthine dehydrogenase inhibitor. Used for treatment of hyperuricemia and chronic gout. 40-120 mg/day febuxostat was proven effective in lowering serum urate levels when administered to manage hyperuricemia in patients with gout.

• Synthesis

  A mixture of 4-cyanophenol, NaOH, and ethanol was mixed in a pressure bottle while heated to 80° C. Hydrogen sulfide gas was then introduced, and the pressure increased to 30-60 psi until the thioamidation was determined to be complete by HPLC. Without isolating the thioamide product, HCl was added to the bottle until the pH was below 3.5, the H2S gas was removed, and the bottle was placed under a vacuum for 20 minutes at 30-40° C. The reaction was then heated to 70° C, and ethyl 2-chloroacetoacetate(1.1 eq.) was added to the reaction solution. The reaction was mixed under reflux for 2-3 hours, treated with enough H2O to dissolve the NaCl salt in the reaction mixture, cooled to room temperature, treated with enough water to precipitate the product, and the solid was collected by filtration. The precipitate was washed with water and dried at 80° C. with nitrogen bleeding to provide Ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate.

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