1971
DOI: 10.1007/bf02883763
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Methyl 9(10)‐formylstearate by selective hydroformylation of oleic oils

Abstract: A highly selective catalyst system has been discovered for the hydroformylation of methyl oleate into methyl 9(10)‐formylstearate in high yields. A rhodium catalyst in the presence of triphenylphosphine is used with oleic esters, acids or triglycerides. Hydroformylation proceeds smoothly at 95‐110C with a 1:1 mixture of H2 and CO at 500 to 2000 psi with or without a solvent, such as toluene. The formylstearate obtained in 90% to 99% conversion from oleate can be either hydrogenated (Raney Ni) or reduced (NaBH4… Show more

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Cited by 75 publications
(20 citation statements)
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“…In the late sixties, several novel hydroformylation catalysts were reported. These catalysts consisted of various substituted phosphine, phosphite, arsine and stibine ligands, used together with cobalt iridium or rhodium (17). These new catalysts were generally more active than cobalt carbonyl and promoted hydroformylation of olefins under milder conditions.…”
mentioning
confidence: 99%
“…In the late sixties, several novel hydroformylation catalysts were reported. These catalysts consisted of various substituted phosphine, phosphite, arsine and stibine ligands, used together with cobalt iridium or rhodium (17). These new catalysts were generally more active than cobalt carbonyl and promoted hydroformylation of olefins under milder conditions.…”
mentioning
confidence: 99%
“…Hydroformylation to branched compounds is also possible using unsaturated fatty acids with internal double bonds as raw materials, although recent literature, e.g., on methyl oleate hydroformylation, mostly focuses on formation of linear products [79][80][81][82][83][84]. Methyl oleate can be transformed to an equimolar mixture of methyl-9-formylstearate and methyl-10-formylstearate (see Fig.…”
Section: Oxo Synthesis (Hydroformylation)mentioning
confidence: 99%
“…Na literatura há alguns trabalhos em que foi observado que um excesso de fosfina promove uma melhora na conversão, quando comparada com a mesma reação sem excesso de fosfina. 5,12,13 No entanto, nenhum trabalho forneceu evidências experimentais sobre o mecanismo pelo qual este excesso de fosfina atua. Alguns autores sugerem que a presença de ligantes fosforados suprima espécies que levem à isomerização e/ou à hidrogenação do substrato.…”
Section: Efeito Do Excesso De Trifenilfosfinaunclassified
“…1,[17][18][19] Frankel e colaboradores verificaram que a extensão da migração da ligação dupla é inversamente proporcional à concentração de fosfina no meio reacional. 5 Muilwijk e colaboradores verificaram que o excesso de fosfina inibe a isomerização posicional e, também, a isomerização geométrica da ligação dupla. 1 Trzeciak observou, na reação de hidroformilação do 1,5-hexadieno, que a isomerização da ligação dupla é minimizada quando a reação é realizada com um excesso de CO sobre H 2 .…”
Section: Efeito Do Excesso De Trifenilfosfinaunclassified
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