6747-68-8Relevant academic research and scientific papers
Pd/C-H2-catalysed deuterium exchange reaction of the benzylic site in D2O
Sajiki, Hironao,Hattori, Kazuyuki,Aoki, Fumiyo,Yasunaga, Kanoko,Hirota, Kosaku
, p. 1149 - 1151 (2002)
Pd/C is found to catalyse efficient and chemoselective exchange of deuterium derived from D2O with hydrogens on a benzylic carbon in the presence of a catalytic amount of hydrogen at room temperature.
Method for selective deuteration of benzyl-position carbon hydrogen bond of aromatic ring
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Paragraph 0055-0057, (2021/10/30)
The invention discloses a method for selective deuteration of benzyl-position carbon hydrogen bonds of aromatic rings. To the method, η is carried out on an aromatic ring by using a metal rhodium catalyst. 6 The coordination is activated so tha
Efficient and convenient heterogeneous palladium-catalyzed regioselective deuteration at the benzylic position
Kurita, Takanori,Hattori, Kazuyuki,Seki, Saori,Mizumoto, Takuto,Aoki, Fumiyo,Yamada, Yuki,Ikawa, Kanoko,Maegawa, Tomohiro,Monguchi, Yasunari,Sajiki, Hironao
, p. 664 - 673 (2008/12/21)
The Pd/C-catalyzed efficient and regioselective hydrogen-deuterium (H-D) exchange reaction on the benzylic site proceeded in D2O in the presence of a small amount of H2 gas. The use of the Pd/C-ethylenediamine complex [Pd/C(en)] as a catalyst instead of Pd/C led to the efficient deuterium incorporation into the benzylic site of Obenzyl protective groups without hydrogenolysis. These H-D exchange reactions provide a post synthetic and D2-gas-free deuterium-labeling method on a wide variety of benzylic sites using D2O as the deuterium source and heterogeneous Pd/C or Pd/C(en) as a reusable heterogeneous palladium catalyst under mild and neutral conditions.
ZUR BILDUNGSWEISE VON 1-PHENYLPROPYLLITHIUM AUS BENZYLLITHIUM UND ETHYLEN IN TETRAHYDROFURAN
Maercker, Adalbert,Stoetzel, Reinhard
, p. 1 - 12 (2007/10/02)
3-Phenylpropyllithium primarily formed by the addition of benzyllithium to ethylene in THF does not undergo an intramolecular 1,3-proton shift to 1-phenylpropyllithium.Fast protonation by the solvent takes place instead, yielding n-propylbenzene and new ethylene.An equilibrium is then established between n-propylbenzene and additional benzyllithium, with the formation of toluene and 1-phenylpropyllithium; the equilibrium, however, strongly favours the starting materials (K293=1.1*10-4).As, on the other hand, 1-phenylpropyllithium reacts with ethylene much more rapidly than does benzyllithium, it is removed from the equilibrium and mainly branched secondary products are still obtained.
