82584-14-3Relevant articles and documents
Structurally diverse α-substituted benzopyran synthesis through a practical metal-free C(sp3)-H functionalization
Chen, Wenfang,Xie, Zhiyu,Zheng, Hongbo,Lou, Hongxiang,Liu, Lei
supporting information, p. 5988 - 5991 (2015/01/08)
A trityl ion-mediated practical C-H functionalization of a variety of benzopyrans with a wide range of nucleophiles (organoboranes and C-H molecules) at ambient temperature has been disclosed. The metal-free reaction has an excellent functional group tole
Catalyzed selective direct α- And γ-alkylation of aldehydes with cyclic benzyl ethers by using T+BF4- in the presence of an inexpensive organic acid or anhydride
Richter, Heinrich,Rohlmann, Renate,Garcia Mancheno, Olga
supporting information; experimental part, p. 11622 - 11627 (2011/11/06)
The cross dehydrogenative coupling (CDC) of cyclic benzyl ethers with aliphatic and α,β-unsaturated aldehydes has been developed. The mild reaction conditions, in which an N-oxoammonium salt derived from TEMPO (2,2,6,6-tetramethyl-1-piperidinoxyl) is employed as the oxidant in combination with a Cu catalyst, allow the use of relatively redox-unstable aldehydes under oxidative CDC conditions. The addition of a catalytic amount of trifluoroacetic acid (TFA) or Ac2O facilitates the reaction and increases the efficiency and selectivity. In contrast to the expected α-alkylation obtained with aliphatic aldehydes, α,β-unsaturated aldehydes led preferentially to the more challenging γ-alkylated products. The utility of the developed methodology was demonstrated by the synthesis of isochromane-derived bioactive compounds, such as the dopamine antagonist sonepiprazole.
Synthesis and antiulcer activity of (isochroman-1-yl)alkylamines. I
Yamato,Hashigaki,Ishikawa,Hitomi,Kokeguchi
, p. 1758 - 1765 (2007/10/02)
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