Approaches to the synthesis of (+)- and (−)-epibatidine †
作者:M. Teresa Barros、Christopher D. Maycock、M. Rita Ventura
DOI:10.1039/b002980g
日期:——
Synthetic approaches to the powerful analgesic alkaloids (+)- and (â)-epibatidine are described. The starting material employed was natural (â)-quinic acid from which chiral enones and α-iodoenones were prepared. Stille coupling afforded suitable substrates for completion of the syntheses. A key step in this process was the diastereoselective reduction of a cyclohexanone with sodium borohydride and DMSO which sets up the stereochemistry necessary for the formation of the bicycloheptane system. The synthesis of a previously reported enone intermediate has also been improved.
p