A facile and efficient synthetic route to multi-substituted 2-aminopyridines has been developed via a formal [5C + 1N] annulation of readily available 2,4-pentadienenitriles with hydroxylamine (NH2OH) under very mild conditions, which involves sequential intermolecular aza-nucleophilic addition of hydroxylamine, intramolecular aza-cyclization, and dehydration reactions.
3-Butyl-1-methylimidazolinium borohydride ([bmim][BH4])—a novel reducing agent for the selective reduction of carbon–carbon double bonds in activated conjugated alkenes
A novel ionic reducing reagent, 3-butyl-1-methylimidazolium borohydride ([bmim][BH4]), was synthesized and successfully used for the selective reduction of carbon–carbondoublebonds in conjugated alkenes as well as the α,β-carbon–carbon doublebonds in highly activated α,β,γ,δ-unsaturated alkenes. The reagent can be regenerated and reused several times without losing its activity.
A Concise Assembly of Electron-Deficient 2,4-Dienes and 2,4-Dienals: Regio- and Stereoselective<i>exo</i>-Diels-Alder and Redox Reactions through Sequential Amine and Carbene Catalysis
catalysis: A γ,δ‐regioselective anomalous exo‐Diels–Alder reaction with electron‐deficient β‐substituted 2,4‐dienes and 2,4‐dienals has been developed by using trienamine activation. The resulting multifunctional cycloadducts contain perfectly positioned functional groups, thereby facilitating a 1,5‐hydride transfer from the C–H group of an aldehyde to an activated alkene under sequential catalysis of
Styryl compounds which inhibit EGF receptor protein tyrosine kinase
申请人:Yissum Research Development Company of the Hebrew University of Jerusalem
公开号:US05217999A1
公开(公告)日:1993-06-08
A method of inhibiting cell proliferation in a patient suffering from such disorder comprising administering to said patient an effective amount of a composition comprising, in admixture with a pharmaceutically acceptable carrier, a compound, or a pharmaceutically acceptable salt thereof, which is a substituted styrene compound which can also be a naphthalene, an indane or a benzoxazine; including nitrile and molononitrile compounds, and pharmaceutical compositions comprising, in admixture with a pharmaceutically acceptable carrier, a pharmaceutically-effective amount of such compound.
DABCO-Catalyzed [3+2] Cycloaddition of Isatin-Derived Nitrones and Electron-Deficient Dienes via a 1,6-Addition Reaction
作者:Zhen Wang、Weijun Yao、Zihao Luo
DOI:10.1055/a-1863-3494
日期:2022.10
diastereoselective [3+2] dipolar cycloadditions of isatin-derived nitrone ylides with penta-2,4-dienenitriles have been developed. The reaction proceeds through the organic base DABCO catalyzed 1,6-addition to linear penta-2,4-dienenitriles, followed by the intramolecular cyclization. This procedure is capable of tolerating a relatively wide range of nitrone ylides under mild conditions, facilitating the preparation