catalysts based on Al2O3, supercritical carbon dioxide not only acts as a good solvent for the reaction of aromatic and aliphaticaldehydes with 1-nitroalkanes but, most importantly, it also allows the selectivity to be tuned between the competitive formation of beta-nitroalcohols and nitroalkenes (from the Henry reaction and the nitroaldol condensation, respectively). In particular, when the pressure
Preparation of Pyrroles Having Long Alkyl Chains from Nitroalkenes
作者:Noboru Ono、Kazuhiro Maruyama
DOI:10.1246/bcsj.61.4470
日期:1988.12
Pyrroles havinglongalkylchains at the 3-and/or 4-positions are readily prepared by the reaction of ethyl isocyanoacetate with nitroalkenes havinglongalkylchains.
在3-和/或4-位具有长烷基链的吡咯很容易通过异氰乙酸乙酯与具有长烷基链的硝基烯烃反应制备。
NOVEL COMPOUNDS AND METHODS FOR SYNTHESIS AND THERAPY
申请人:BISCHOFBERGER NORBERT W.
公开号:US20050176758A1
公开(公告)日:2005-08-11
Novel compounds are described. The compounds generally comprise an acidic group, a basic group, a substituted amino or N-acyl and a group having an optionally hydroxylated alkane moiety. Pharmaceutical compositions comprising the inhibitors of the invention are also described. Methods of inhibiting neuraminidase in samples suspected of containing neuraminidase are also described. Antigenic materials, polymers, antibodies, conjugates of the compounds of the invention with labels, and assay methods for detecting neuraminidase activity are also described.
Indirect electrooxidation of alcohols and aldehydes by using a double mediatory system consisting of ruthenium tetraoxide/ruthenium dioxide and chlorine cation/chlorine anion redoxes in an aqueous-organic two-phase system
作者:Sigeru Torii、Tsutomu Inokuchi、Toyoyuki Sugiura
DOI:10.1021/jo00352a006
日期:1986.1
Facile Regiocontrolled Synthesis of Trialkyl-Substituted Pyrazines
作者:Tarek Abou Elmaaty、Lyle W. Castle
DOI:10.1021/ol0523751
日期:2005.11.1
alpha-Nitro ketones can be transformed selectively into trialkyl-substituted pyrazines via reaction with a-amino ketones using octyl viologen as an electron-transfer reagent. The new synthetic method, and the optimal reaction conditions that allow for the regiochemical control, are described.