Heterogeneous Amine Catalyst Grafted on Amorphous Silica: An Effective Organocatalyst for Microwave-promoted Michael Reaction of 1,3-Dicarbonyl Compounds in Water

2006 ◽  
Vol 35 (8) ◽  
pp. 926-927 ◽  
Author(s):  
Hisahiro Hagiwara ◽  
Sachiyo Inotsume ◽  
Masakazu Fukushima ◽  
Takashi Hoshi ◽  
Toshio Suzuki
Keyword(s):  
Amorphous Silica ◽  
Michael Reaction ◽  
Dicarbonyl Compounds

Heterogeneous Amine Catalyst Grafted on Amorphous Silica: An Effective Organocatalyst for Microwave-Promoted Michael Reaction of 1,3-Dicarbonyl Compounds in Water.

ChemInform ◽  
2007 ◽  
Vol 38 (2) ◽  
Author(s):  
Hisahiro Hagiwara ◽  
Sachiyo Inotsume ◽  
Fukushima. Masakazu Fukushima. Masakazu ◽  
Takashi Hoshi ◽  
Toshio Suzuki
Keyword(s):  
Amorphous Silica ◽  
Michael Reaction ◽  
Dicarbonyl Compounds

ChemInform Abstract: UNUSUAL MICHAEL REACTION OF ACYCLIC 1,3-DICARBONYL COMPOUNDS WITH NITROOLEFINS. A NOVEL PYRROLE SYNTHESIS

1982 ◽  
Vol 13 (21) ◽  
Author(s):  
A. GOMEZ-SANCHEZ ◽  
B. M. STIEFEL ◽  
R. FERNANDEZ-FERNANDEZ ◽  
C. PASCUAL ◽  
J. BELLANATO
Keyword(s):  
Michael Reaction ◽  
Dicarbonyl Compounds

The Retro-Michael Reaction of 1,5-Dicarbonyl Compounds: Scope and Limitation

1999 ◽  
Vol 64 (1) ◽  
pp. 107-113 ◽  
Author(s):  
Jian-Xin Wang ◽  
Tong-Shuang Li
Keyword(s):  
Good Yield ◽  
Steam Distillation ◽  
Michael Reaction ◽  
Glass Wool ◽  
Dicarbonyl Compounds ◽  
Keto Esters ◽  
Tricyclic Compounds ◽  
Keto Acids

Under catalysis of NaOH or KOH adsorbed on glass wool and by using steam distillation, (20R,S)-4,4,5,14-tetramethyl-18,19-dinor-13,17-seco-5β,8α,9β,10α,14β-cholestane-13,17-dione (1) and 3,14-dioxo-14,15-seco-5α-cholestan-15-al (4) gave good yield (>59%) of the corresponding tricyclic compounds (8a, 8b and 10a) via a retro-Michael reaction at 250 °C. While 5-oxo-4-nor-3,5-secocholestan-3-oic acid (6) and ethyl 5-oxo-4-nor-3,5-secocholestan-3-oate (7) afforded low yield (<15%) of the retro-Michael cleavage products (12a, 12b) at the same conditions. Thus, the retro-Michael reaction worked well for 1,5-diketones and 1,5-keto aldehydes but gave poor yield for 1,5-keto esters and 1,5-keto acids.

Unusual Michael reaction of acyclic 1,3-dicarbonyl compounds with nitre-olefins. A novel pyrrole synthesis

1982 ◽  
pp. 441-447 ◽  
Author(s):  
Antonio Gómez-Sánchez ◽  
Berta Marco Stiefel ◽  
Rosario Fernández-Fernández ◽  
Conrado Pascual ◽  
Juana Bellanato
Keyword(s):  
Michael Reaction ◽  
Dicarbonyl Compounds
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