Diastereoselective Synthesis of Spirocyclic Dihydrofurans and 1-Oxaspiro[4.5]decan-6-one Derivatives from Norbornyl α-Diketones
作者:Surendra H. Mahadevegowda、Faiz Ahmed Khan
DOI:10.1002/ejoc.201403087
日期:2015.2
A diastereoselective zinc-mediated propargylation of non-enolizable norbornylα-diketones and an efficient AgI-catalyzed cycloisomerization of the resulting α-keto homopropargyl alcohols with terminal alkynes leading to spirocyclicdihydrofurans have been reported. The dihydrofurans obtained were subjected to hydrogenation to afford spiro tetrahydrofuran derivatives in nearly quantitative yields (98-99%)