A detailed study of the Ni‐catalyzed [4+3+2] cycloaddition reaction between ethyl cyclopropylideneacetate and dienynes has been conducted, resulting in the development of a newmethod for the synthesis of compounds containing nine‐membered rings. We studied the reactivity of various dienynes, together with their substituent and conformational effects. The mechanism of the reaction was probed by examining
Asymmetric Catalytic Reductive Coupling of 1,3-Enynes and Aromatic Aldehydes
作者:Karen M. Miller、Elizabeth A. Colby、Katrina S. Woodin、Timothy F. Jamison
DOI:10.1002/adsc.200505175
日期:2005.10
Nickel-catalyzed reductive coupling reactions of 1,3-enynes and aromaticaldehydes efficiently afford conjugated dienols in excellent regioselectivity and modest enantioselectivity when conducted in the presence of catalytic amounts of a monodentate, P-chiral ferrocenyl phosphine ligand. 1-(Trimethylsilyl)-substituted enynes are shown to be effective coupling partners in these reactions, and the dienol products
Nasarow; Fischer, Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1948, p. 436,441
作者:Nasarow、Fischer
DOI:——
日期:——
Enantioselective Diels–Alder reactions of chiral racemic acyclic dienes with (SS)-2-(p-tolylsulfinyl)-1,4-naphthoquinone
作者:M.Carmen Carreño、Susana Garcı́a-Cerrada、Antonio Urbano、Claudio Di Vitta
DOI:10.1016/s0957-4166(98)00323-1
日期:1998.9
Enantiopure sulfinylnaphthoquinone (+)-1 reacted with racemic acyclic dienes 2a-f bearing a stereogenic allylic center, through a tandem cycloaddition/pyrolytic sulfenic acid elimination, to afford enantio-enriched compounds 4a-f and 5a-f with good like:unlike selectivities (ca. 75:25) and good enantiomeric excesses (68-82%), arising from the partial kinetic resolution of the racemic dienes. (C) 1998 Elsevier Science Ltd. All rights reserved.