OPPOLZER, W.;SNOWDEN, R. L.;SIMMONS, D. P., HELV. CHIM. ACTA, 1981, 64, N 7, 2002-2021
作者:OPPOLZER, W.、SNOWDEN, R. L.、SIMMONS, D. P.
DOI:——
日期:——
3-Triethylsilyloxypentadienyllithium, a Versatile 1,3-Diene- or Vinyl Ketone-Building Block
作者:Wolfgang Oppolzer、Roger L. Snowden、Dana P. Simmons
DOI:10.1002/hlca.19810640705
日期:1981.11.4
(Table 1) aldehydes and ketones attack preferentially the γ-position of 4(Table 2). The desired γ-products 6 may be directly subjected to inter- and intramolecular [4 + 2]-additions as demonstrated by the reactions 5a ( 6d) 7 and 6h 19(Schemes 4 and 12). Alternatively, smooth fluoride-promoted silylether-cleavage 6 11(Scheme 8) provides a convenient approach to substituted vinyl ketones such as to