Abstract
The palladium-catalyzed telomerization of 1,3-butadiene with alcohols has been studied in presence of palladium and imidazolium salts, which form in situ carbene ligands. Among the different imidazolium salts tested 1,3-dimesitylimidazolium chloride ( 7), 1,3-bis(ferrocenylmethyl)benzimidazolium tetraphenylborate ( 12) and 1,3-bis(2-ferrocenylethyl)benzimidazolium bromide ( 13) gave the best yields of the desired octadienyl ethers. Significantly improved regioselectivities for the linear octadienylethers are obtained in the reaction of 1,3-butadiene and methanol compared to the previously optimized palladium/triphenylphosphine catalyst. Using n-butanol and iso-propanol the palladium carbene catalysts lead to a considerable increase in the corresponding telomerization products compared to standard palladium/triphenylphosphine catalysts.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
