216854-25-0Relevant academic research and scientific papers
Highly Enantioselective Asymmetric Hydrogenation of α-Phthalimide Ketone: An Efficient Entry to Enantiomerically Pure Amino Alcohols
Lei, Aiwen,Wu, Shulin,He, Minsheng,Zhang, Xumu
, p. 1626 - 1627 (2004)
A new type of α-phthalimide ketones was hydrogenated in excellent enantioselectivity by using a Ru-(C3-TunePhos) complex as the catalyst. Up to 10000 turnovers have been achieved in more than 99% ee in the hydrogenation reaction. A dynamic kinetic resolution study for the synthesis of threonine was performed, and high anti selectivity (>97:3) was observed for the first time. An efficient method to synthesize enantiomerically pure amino alcohols has been developed. Copyright
Bromophilic substitution/carbophilic substitution cascade reactions of α,α-dibromo-2-methoxyacetophenone with C-, N- and O-nucleophiles
Tatar, Jovana,Markovi?, Rade,Stojanovi?, Milovan,Baranac-Stojanovi?, Marija
scheme or table, p. 4851 - 4855 (2010/10/02)
α,α-Dibromo-2-methoxyacetophenone reacts, under mild reaction conditions, with C-, N- and O-nucleophiles via a bromophilic substitution/protonation/carbophilic substitution cascade process to afford α-monosubstituted-2-methoxyacetophenones in moderate to good yield. The only exception from this reaction pathway is the reaction with the anion derived from malononitrile in which 2-aroyl-1,1,3,3-tetracyanopropene is obtained.
Palladium-catalyzed asymmetric hydrogenation of functionalized ketones
Wang, You-Qing,Lu, Sheng-Mei,Zhou, Yong-Gui
, p. 3235 - 3238 (2007/10/03)
(Chemical Equation Presented) A novel catalytic system for asymmetric hydrogenation of functionalized ketones has been developed using a Pd/bisphosphine complex as the catalyst in 2,2,2-trifluoroethanol. The reaction exhibits high enantioselectivity, and
A convenient one-pot synthesis of 4-amino-3-arylpyrazoles from α- phthaloylaminoacetophenones
Chen, Chen,Wilcoxen, Keith,McCarthy, James R.
, p. 8229 - 8232 (2007/10/03)
Condensation of α-phthaloylaminoacetophenones 1a-c with N,N- dimethylformamide dimethyl acetal afforded the novel enamines 3a-c. Cyclization of 3 with hydrazine, alkylhydrazine or phenylhydrazine salts (4a- d) gave 4-phthaloylamino-3-arylpyrazoles 7-9 in
