Conjugate addition of lithium phenylthio- and cyano-[2-(4-chlorobut-1-enyl)]cuprate to cyclic enones. An efficient methylenecyclopentane annulation process
作者:Edward Piers、Veranja Karunaratne
DOI:10.1039/c39830000935
日期:——
Reaction of the cyclicenones (6)–(11) with the structurally interesting cuprate reagent (2) and (3) provides very good yields of the conjugateaddition products (12)–(17); treatment of the latter substancesh with potassium hydride in tetrahydrofuran affords the methylenecyclopentaneannulation products (18)–(23), respectively.