In superacids with H0 = -14 to -20, it has been found that 1,3-diarylpropynones ArC≡CCOAr′ are either protonated on oxygen of carbonyl groups with the formation of stable ions ArC≡CC(O +H)Ar′ or undergo further transformations when t
Vasilyev,Walspurger,Haouas,Sommer,Pale,Rudenko
p. 3483 - 3489
(2007/10/03)
Protonation and cyclization of 1,3-diarylpropynones in superacids
1,3-Diarylpropynones ArC≡CCOAr′ in superacids with H 0 ranging from -20 to - 14 undergo protonation at the carbonyl oxygen atoms to give stable ArC≡CC(O+H)Ar′ ions or at the acetylenic C2 atom with formation of reactive Ar
Vasil'ev,Walspurger,Pale,Sommer,Haouas,Rudenko
p. 1769 - 1778
(2007/10/03)
A new, fast and efficient synthesis of 3-aryl indenones: Intramolecular cyclization of 1,3-diarylpropynones in superacids
1,3-Diarylpropynones were cleanly converted to the corresponding 3-arylindenones in various superacidic media. This new, simple, one-pot reaction proved to be efficient (yields up to 95%) and very fast (reaction time less than 30min).
Vasilyev, Aleksander V.,Walspurger, Stéphane,Pale, Patrick,Sommer, Jean
p. 3379 - 3381
(2007/10/03)
A highly enantioselective conjugate reduction of 3-arylinden-1-ones using bakers' yeast for the preparation of (S)-3-arylindan-1-ones.
[formula: see text] The bakers' yeast reduction of 3-(1,3-benzodioxol-5-yl)-6-propoxy-1H-inden-1-one 4 has been shown to give (S)-3-(1,3-benzodioxol-5-yl)-2,3-dihydro-6-propoxy-1H-indan-1-one 6 in 65% yield with high enantioselectivity (> 99.0% ee), a key
Clark,Kassick,Plotkin,Eldridge,Lantos
p. 1839 - 1842
(2008/02/11)
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