Palladium-catalyzed allylic alkenylation of allylic alcohols with n-butyl acrylateElectronic supplementary information (ESI) available: spectral data for compounds 1, 2, 4, and 5. See http://www.rsc.org/suppdata/cc/b3/b307705e/
作者:Naofumi Tsukada、Tetsuo Sato、Yoshio Inoue
DOI:10.1039/b307705e
日期:——
Various allylic alcohols reacted with n-butyl acrylate in the presence of p-toluenesulfonic anhydride and palladium catalysts to yield the corresponding n-butyl 2,5-dienoates with high regioselectivity.
Retro-allylation of homoallyl alcohols by rhodium catalysts occurs to generate allylrhodium species. Insertion of acrylate esters to the allylrhodiums proceeds to give the corresponding 2,5-hexadienoate esters in situ. Subsequent isomerization or iterative 1,4-addition takes place in the same pots to furnish the corresponding 2,4-hexadienoate esters or triesters in good yields. (c) 2007 Elsevier Ltd. All rights reserved.