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CATALISIS

CATALISIS. COMPARACION ENTRE CATALISIS HOMOGENEA Y HETEROGENEA. IVERMECTINA: reducción con catalizador Rh/PPh 3. ESTEROIDE. PROCESOS INDUSTRIALES valores en miles de toneladas. TONs y TOFs. METATESIS AB + CD = AD + CB. LA DANZA DE LOS ALQUENOS (o intercambio de parejas).

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CATALISIS

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  1. CATALISIS

  2. COMPARACION ENTRE CATALISIS HOMOGENEA Y HETEROGENEA

  3. IVERMECTINA:reducción con catalizador Rh/PPh3 ESTEROIDE

  4. PROCESOS INDUSTRIALESvalores en miles de toneladas

  5. TONs y TOFs

  6. METATESIS AB + CD = AD + CB

  7. LA DANZA DE LOS ALQUENOS(o intercambio de parejas)

  8. METATESIS: CATALIZADORES • Schrock 1990 • Muy reactivo • Menos reactivo • Estable al aire, y solventes próticos PCy3 = triciclohexilfosfina ángulo de cono: 170° PPH3:ángulo de cono: 145°

  9. METATESIS: APLICACIONES

  10. METATESIS: APLICACIONES

  11. METATESIS: APLICACIONES

  12. METATESIS: APLICACIONES

  13. ROMP The catalysts used for ROMP are the same catalysts used for olefin metathesis. However, one has to be a little more careful when selecting a ROMP catalyst. If the catalyst is too active, it can metathesize the unstrained olefinic bonds in the growing polymer chain (a process called "back-biting"), thereby reducing the molecular weight and increasing the molecular weight distribution (polydispersity). For example, consider the synthesis of polyacetylene by ROMP of cyclooctatetraene shown below. Backbiting occurs when the growing polymer chain can orient to undergo an intramolecular metathesis and generate benzene, a thermodynamic sink. To prevent backbiting in this or other systems you must make sure your catalyst does not react with internal olefins!

  14. ROMP: TERMINACION • REACCION CON ALDEHIDOS • TRANSFERENCIA DE CADENA

  15. HIDROGENACION DE WILKINSON

  16. HIDROGENACION DE WILKINSON: catiónicos -C7H12

  17. LIGANDOS ASIMETRICOS BINAP

  18. ESTEREOSELECTIVIDAD Al hidrolizar la amida (NH2): L-Dopa (mal de Parkinson)

  19. Rh / CHIRAFOS

  20. POLIMERIZACION DE ALQUENOS ZIEGLER-NATTA

  21. POLIMERIZACION DE ALQUENOS – ZIRCONOCENOS/MAO

  22. POLIMERIZACION DE ALQUENOS

  23. TACTICIDAD

  24. Coordinación re versus si

  25. Coordinación re versus si

  26. Science, 1995, 267, 217

  27. HIDROFORMILACION • REACCIONES COMPETITIVAS

  28. HIDROFORMILACION: COBALTO 18 e- SUSTITUCION DE LIGANDO (MECANISMO DISOCIATIVO) AdOx-ElRed INSERCION 1,2 INSERCION 1,1 Anti-Markovnikov Markovnikov

  29. HIDROFORMILACION: RODIO

  30. HIDROFORMILACION

  31. CARBONILACION DE METANOL (MONSANTO)

  32. ACOPLAMIENTO DE HECK

  33. REGIOSELECTIVIDAD

  34. ESTEREOSELECTIVIDAD INDUCCION ASIMETRICA E

  35. ACOPLAMIENTO DE SONOGASHIRA

  36. ACOPLAMIENTO DE SONOGASHIRA

  37. ACOPLAMIENTO DE SONOGASHIRA Ligandos y complejos FOSFINAS COMPLEJOS DE NITROGENO

  38. ACOPLAMIENTO DE SONOGASHIRA Aplicaciones sintéticas ALQUINILACIÓN DE HETEROCICLOS Y ARENOS SÍNTESIS DE ENINAS CARBOCICLOS y HETEROCICLOS

  39. ACOPLAMIENTO DE SONOGASHIRA Aplicaciones sintéticas SÍNTESIS DE PRODUCTOS NATURALES SÍNTESIS DE MATERIALES ELECTRÓNICOS Y ELECTRO-ÓPTICOS

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