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.
Multiple pathways in rhodium-catalyzed reactions of 1-alkynes with 3-butenoic acid
作者:Giuseppe Salerno、Maria Panza、Gian Paolo Chiusoli、Mirco Costa