Fleming, Ian; Newton, Trevor W., Journal of the Chemical Society. Perkin transactions I, 1984, # 8, p. 1805 - 1808
作者:Fleming, Ian、Newton, Trevor W.
DOI:——
日期:——
Conjugate addition of dimethylphenylsilyllithium to α,β-unsaturated carbonyl compounds mediated by sub-stoichiometric quantities of dimethylzinc
作者:Bonnie L. MacLean、Kimberlea A. Hennigar、Kevin W. Kells、Robert D. Singer
DOI:10.1016/s0040-4039(97)01776-0
日期:1997.10
Dimethylphenylsilyllithium undergoes conjugate addition to a variety of alpha,beta-unsaturated enones in the presence of sub-stoichiometric amounts of dimethylzinc. Down to 10 mol % of Me2Zn facilitates these reactions to afford good to excellent yields of beta-silylated products. This catalytic behavior is displayed when the Me2Zn used is generated in situ from the addition of methyllithium to zinc (II) iodide or when used directly from a commercial source. This methodology in which sub-stoichiometric quantities of the reactive organometallic reagent are present at a given time may provide a route for catalytic enantioselective conjugate addition of trialkylsilyl moieties to enones. (C) 1997 Elsevier Science Ltd.
Krohn, Karsten; Khanbabaee, Karamali, Liebigs Annalen der Chemie, 1994, # 11, p. 1109 - 1112
作者:Krohn, Karsten、Khanbabaee, Karamali
DOI:——
日期:——
Total synthesis of urdamycinone B via C-glycosidation of an unprotected sugar and Diels–Alder reaction of C-glycosyl juglone
The total synthesis of C-glycosyl angucycline, urdamycinone B 1, was achieved via C-glycosidation of naphthol 6 and the unprotected o-olivose 7, and Diels-Alder reaction of the unprotected C-glycosyl juglone 9 and the diene 17 as the key steps.