A general route to 5-substituted-2-furylacetic acids: a brief synthesis of plakorsin B
作者:Simon J. Hayes、David W. Knight、Andrew W.T. Smith、Mark J. O’Halloran
DOI:10.1016/j.tetlet.2009.11.120
日期:2010.1
3,4-Dihydroxy-5-alkynylcarboxylic acids, readily obtained by the addition of lithium acetylides to α-acetoxysuccinic anhydride followed by reduction and hydrolysis, undergo smooth silver(I)-catalysed 5-endo-dig cyclisations and in situ dehydration to give excellent overall yields of 5-substituted-2-furylacetic acids, including the natural metabolite plakorsin B.