The title cyclic phosphonium salt (1) reacted with various aldehydes to give the phosphine oxides (2a–d) in good yield; these when treated with aldehydes in the presence of BuLi gave the alcohols (4a, b). The alcohol (4a) was easily converted into the 1,6-diene (5) by treatment of NaH in DMF. The stereoselectivities of these reactions are also described.
I. Yamamoto, T. Fujimoto, K. Ohta and K. Matsuzaki, J. Chem. Soc., Perkin Trans. 1, 1987, 1537 DOI: 10.1039/P19870001537
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