Stereoselective Synthesis of Spirocyclic Ketones by Nazarov Reaction
作者:Cristina Prandi、Annamaria Deagostino、Paolo Venturello、Ernesto G. Occhiato
DOI:10.1021/ol051464a
日期:2005.9.1
[reaction: see text] The Suzuki-Miyaura cross-coupling reaction between alpha-ethoxydienyl boronates and lactone-derived vinyl triflates affords functionalized 6-(1-ethoxy-1,3-butadienyl)dihydropyran derivatives that undergo a Nazarov electrocyclic reaction under mild acidic conditions to give functionalized spirocyclic ketones. The product distribution and the stereoselectivity of the process are