RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      선택해제

      오늘 본 자료

      • 오늘 본 자료가 없습니다.
      더보기
      • 무료
      • 기관 내 무료
      • 유료
      • KCI등재

        Selective hydrogenation of benzonitrile and its homologues to primary amines over platinum

        Krisztina Lévay,Tamás Kárpáti,László Heged}us 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.101 No.-

        Various supported precious metal (Pt, Rh, Ru, Ir) catalysts have been screened in the reduction of benzonitrile(BN), benzyl cyanide (BC) and 3-phenylpropionitrile (PPN) to benzylamine (BA), 2-phenylethylamine (PEA) and 3-phenylpropylamine (PPA), using our method for selective, heterogeneous,palladium-catalysed hydrogenation of nitriles to primary amines developed previously. A readily availableplatinum on carbon catalyst (10% Pt/C) afforded the best results obtaining complete conversion ofnitriles, as well as comparatively high isolated yields (58–70%) and selectivities to primary amines(57–68%) under mild and optimized conditions [6 bar, 30 C, two immiscible solvents (dichloromethane/water or toluene/water), acidic additives (NaH2PO4, (NH4)H2PO4 or H2SO4)]. Contrary to the typicalhigh secondary amine selectivity of platinum, surprisingly, this Pt/C catalyst proved to be much moreeffective and selective in the formation of PEA and PPA than a Pd/C one applied earlier. To clear the divergencesin the primary amine selectivity observed, quantum chemical calculations (DFT) were accomplishedrelated to the adsorption interactions between the imine intermediates and platinum.

      연관 검색어 추천

      이 검색어로 많이 본 자료

      활용도 높은 자료

      해외이동버튼