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Carbonyl cpds. prodn. - by liq. phase oxidn. of olefin(s) with hydrogen peroxide or organic hydroperoxide using palladium complex catalyst (BE 12.6.80)
Carbonyl cpds. prodn. - by liq. phase oxidn. of olefin(s) with hydrogen peroxide or organic hydroperoxide using palladium complex catalyst (BE 12.6.80)
Carbonyl cpds. are produced in the liq. phase by oxidn. of olefins R-CH=CH-R' in which R and R' are each H or 1-20 C hydrocarbyl, or together form an alkylene gp. The reaction is carried out in the presence of (a) A catalyst of formula PdAA'Lm in which A and A' may be the same or different, A is fluoroborate, acetate or trifluoroacetate and A' is as for A or pi-allyl or OOR1 in which R1 is a hydrocarbon gp., m = O or 2, and L is a ligand chosen from amine, phosphine, arsine, stibine and amide; and (b) an oxidising agent chosen from H2O2 and organic peroxides R2OOH in which R2 is a tert. hydrocarbon gp., alkyl, aralkyl or alkylaryl with 4-20 C. Process is carried out in the absence of Cl ion, so that problems of corrosion are avoided. The process uses salts and complexes of a single metal (Pd) and gives high selectivity to the prodn. of the desired carbonyl cpds. with a wide range of olefin starting materials.
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