Diesters of carbonic acid endowed with antiviral and anti-inflammatory
申请人:Italfarmaco S.P.A.
公开号:US05827881A1
公开(公告)日:1998-10-27
Diesters of carbonic acid disubstituted with primary, secondary or tertiary amine groups, pharmaceutically acceptable salts thereof, and their use as antiviral and inti-inflammatory agents.
Michael Additions in Aqueous Media: “On-Water” and “In-Water” Processes from α-Nitro Ketones and Their Anions
作者:Giorgio Giorgi、Pilar López-Alvarado、Sonia Miranda、Jean Rodriguez、J. Carlos Menéndez
DOI:10.1002/ejoc.201201431
日期:2013.3
A variety of α,β-unsaturatedaldehydes and ketones gave very high-yielding Michael addition reactions with α-nitrocycloalkanones in water, at room temperature without added catalyst. These can be considered as one of the very few “on-water” Michael reactions known in the literature, because they took place in suspension or emulsion and at increased speed relative to the same transformations performed
A New, One Pot Synthesis of Alkylated Methyl Tri- and Tetracarboxylate Derivatives by Nitrolkanes
作者:Roberto Ballini、Giovanna Bosica、Dennis Fiorini、Maria Victoria Gil、Alessandro Palmieri
DOI:10.1055/s-2004-815948
日期:——
The reaction of nitroalkanes with trimethyl trans-aconitate in acetonitrile, in the presence of DBU as base, allows the one pot formation of alkylated methyl tri- and tetralkanoate derivatives via base induced nitrous acid elimination. The title compounds can also be obtained, in one flask, starting with the reaction of methyl nitroacetate with dimethyl maleate, followed by the addition, in the same flask of the nitroalkane.
Amberlyst-A21 as a New and Efficient Surface Catalyst for the Conjugate Addition of Nitroalkanes to Methyl Acrylate: An Improved Synthesis of Methyl 4-Nitro- and 4-Oxo-alkanoates
作者:Roberto Ballini、Marino Petrini、Goffredo Rosini
DOI:10.1055/s-1987-28054
日期:——
Utilization of Amberlyst-A21 without solvent in the conjugate addition of nitroalkenes to methyl acrylate, affords 4-nitroalkanoic methyl esters in good yields. Successive Nef reaction, using potassium permanganate, provides functionalized 4-oxoalkanoic methyl esters.
Diastereoselective Synthesis of 2,3,6-Trisubstituted Piperidines
作者:John M. Humphrey、Eric P. Arnold、Thomas A. Chappie、John B. Feltenberger、Arthur Nagel、Wendy Simon、Melani Suarez-Contreras、Norma J. Tom、Brian T. O’Neill
DOI:10.1021/jo9003184
日期:2009.6.19
Stereocontrol at C-6 was accomplished by utilizing a variety of imine reduction methods. The C-2/C-6-cis stereochemistry was established via triacetoxyborohydride iminium ion reduction, whereas the trans relationship was set either by triethylsilane/TFA acyliminium ion reduction or by Lewis acid catalyzed imine reduction with lithiumaluminumhydride.