Metallic porphyrin complexes as catalysts in epoxidation reactions
First Claim
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1. A process for the epoxidation of olefins, the process comprising contacting an olefin with a catalytic amount of a metallic porphyrin complex wherein the metal is Ru, Os, Rh, Ir, Nb or Re, in the substatial absence of coreductants and peroxidic oxidants under reaction conditions such that an epoxide of the olefin is formed.
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Abstract
Metallic porphyrin complexes are useful as catalysts for the epoxidation of olefins at ambient temperature and pressure using oxygen, which preferably is supplied either as air or pure oxygen, without need for a coreductant.
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19 Claims
- 1. A process for the epoxidation of olefins, the process comprising contacting an olefin with a catalytic amount of a metallic porphyrin complex wherein the metal is Ru, Os, Rh, Ir, Nb or Re, in the substatial absence of coreductants and peroxidic oxidants under reaction conditions such that an epoxide of the olefin is formed.
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10. A process for the epoxidation of olefins comprising contacting under reaction conditions an olefin with oxygen and a catalytic amount of a catalyst represented generally by the formula:
- ##STR4## wherein each Ra and Rb independently is aryl, haloaryl, alkyl, halo, haloalkyl, haloalkaryl, aralkyl, alkaryl or haloaralkyl; and
each n independently is from zero to 3. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- ##STR4## wherein each Ra and Rb independently is aryl, haloaryl, alkyl, halo, haloalkyl, haloalkaryl, aralkyl, alkaryl or haloaralkyl; and
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19. An aerobic process for the selective epoxidation of olefins, the process comprising contacting an olefin with air at about ambient temperature and pressure in the presence of dioxo[5,10,15,20-tetrakis(2,4,6-trimethylphenyl)-21H,23H-porphinato(2-)-N21,N22,N23,N24]-ruthenium and in the substantial absence of a peroxidic oxidant under reaction conditions such that an epoxide of the olefin is formed.
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