scholarly journals Ca(OH)2-Catalyzed Condensation of Aldehydes with Methyl ketones in Dilute Aqueous Ethanol: A Comprehensive Access to α,β-Unsaturated Ketones

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Lei Yu ◽  
Mengting Han ◽  
Jie Luan ◽  
Lin Xu ◽  
Yuanhua Ding ◽  
...  
Keyword(s):  
Aqueous Ethanol ◽  
Methyl Ketones ◽  
Unsaturated Ketones

Methods for preparation of heterobifunctional nitroxides: α,β-unsaturated ketones, β-ketoesters, cyano-nitro-derivatives

1982 ◽  
Vol 60 (12) ◽  
pp. 1432-1438 ◽  
Author(s):  
H. Olga Hankovszky ◽  
Kálmán Hideg ◽  
László Lex ◽  
Gyula Kulcsár ◽  
H. Anna Halász
Keyword(s):  
Methyl Ketones ◽  
Reaction Products ◽  
Unsaturated Ketones ◽  
Nitro Derivatives

The reactions of 1-oxyl-2,2,5,5-tetramethyl-3-pyrroline-3-carboxaldehyde (1), 1-oxyl-2,2,5,5-tetramethyl-3-cyano-3-pyrroline (2), ethyl 1-oxy(-2,2,5,5-tetramethyl-3-pyrroline-3-carbonyl carbonate (3), and N-(1-oxyl-2,2,5,5-tetramethyl-3-pyrroline-3-carbonyl)imidazolide (4) are investigated with several nucleophiles (dialkylcadmium, diethyl sodio-malonate, magnesium enolate of ethyl hydrogen malonate, nitromethane-anion) to obtain α,β-unsaturated ketones, β-ketoesters, or conjugated reaction products. Aldehyde 1 is reacted with several methyl ketones (acetylmethylene-triphenylphosphorane, acetophenone, 2-acetylpyridine, 4-phenyl-3-butyn-2-one) to give spin labeled polyenones. The reaction of 4-(1-oxyl-2,2,5,5-tetramethyl-3-pyrroline-3-yl)-2-buten-2-one (24a) with ethylenediamine gives 7,14-bis-(1-oxyl-2,2,5,5-tetramethyl-3-pyrroline-3-yl)-5,12-dimethyl-1,4,8,11-tetraazatetradeca-7,14-diene biradical (25).

1,4-Reductions of α,β-Unsaturated Ketones and Aldehydes via in situ Generated Hydridocuprates

Synlett ◽  
1989 ◽  
Vol 1989 (01) ◽  
pp. 64-66 ◽  
Author(s):  
Bruce H. Lipshutz ◽  
Christopher S. Ung ◽  
Saumitra Sengupta
Keyword(s):  
Unsaturated Ketones
Sign in / Sign up

Export Citation Format

Share Document