)-alkenylstannanes from aldehydesDavid M. Hodgson, Anne M. Foley, Lee T. Boulton, Peter J. Lovell and Graham N. Maw
A synthesis of the dienone 7 via an efficient intramolecular Stille cross-coupling reaction, an improved chromium(II)-mediated synthesis of (E
)-alkenylstannanes from aldehydes using Bu3SnCHI2 in DMF, and a synthesis of the substituted (–)-dienone 25 via ring-closing alkene metathesis to give dihydropyran 22 are described. The synthesis of (–)-dienone 25 constitutes a formal synthesis of (–)-periplanone-B.