Ethyl ricinoleate, hydroformylation

Other Cig-fatty acids have also a high potential in hydroformylation, such as ricinoleic acid, which contains an additional hydroxy group at position 12 of the fatty carbon chain and which is not food relevant [26], The hydroformylation of ethyl ricinoleate, derived from castor oil, shows selectivity for cyclization of the carbon chain because of the reaction of the hydroxyl group with the formyl group (Scheme 8). 

Furlan Mendes AN, da Rosa RG, Gregorio JR (2005) Furans and pyrans derivatives from the hydroformylation of ethyl ricinoleate and castor oil. Catal Commun 6(6) 379-384. doi 10.1016/j. catcom.2005.03.001... 

Ricinoleic acid contains a hydroxyl function at a stereogenic carbon atom. Such additional functional groups may interact with transition-metal catalysts causing directing effects or lead to their deactivation. In the hydroformylation of ethyl ricinoleate, the formed aldehydes are converted immediately into cyclic ethers by acetalization and subsequent dehydration (Scheme 6.87) [36]. 

Scheme 6.87 Hydroformylation of ethyl ricinoleate and subsequent reactions.

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See also in sourсe #XX -- [ ]

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