ChemInform Abstract: Enantioselective Michael Reaction of β-Keto Esters Organocatalyzed by Recoverable Cinchona-Derived Dimeric Ammonium Salts.

ChemInform ◽  
2010 ◽  
Vol 41 (22) ◽  
pp. no-no
Author(s):  
Silvia Tari ◽  
Rafael Chinchilla ◽  
Carmen Najera
Keyword(s):  
Michael Reaction ◽  
Ammonium Salts ◽  
Keto Esters

2-Azanorbornane-Based Amino Alcohol Organocatalysts for Asymmetric Michael Reaction of β-Keto Esters with Nitroolefins

2019 ◽  
Vol 2019 (24) ◽  
pp. 3882-3889 ◽  
Author(s):  
Rei Togashi ◽  
Madhu Chennapuram ◽  
Chigusa Seki ◽  
Yuko Okuyama ◽  
Eunsang Kwon ◽  
...  
Keyword(s):  
Amino Alcohol ◽  
Michael Reaction ◽  
Keto Esters ◽  
Asymmetric Michael Reaction

scholarly journals Highly Enantioselective Construction of Quaternary Stereocenters onβ-Keto Esters by Phase-Transfer Catalytic Asymmetric Alkylation and Michael Reaction

2003 ◽  
Vol 115 (34) ◽  
pp. 4111-4111 ◽  
Author(s):  
Takashi Ooi ◽  
Takashi Miki ◽  
Mika Taniguchi ◽  
Misato Shiraishi ◽  
Mifune Takeuchi ◽  
...  
Keyword(s):  
Michael Reaction ◽  
Phase Transfer ◽  
Asymmetric Alkylation ◽  
Keto Esters ◽  
Catalytic Asymmetric ◽  
Quaternary Stereocenters

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.

scholarly journals Catalytic Asymmetric Michael Reaction of β-Keto Esters: Effects of the Linker Heteroatom in Linked-BINOL.

ChemInform ◽  
2004 ◽  
Vol 35 (17) ◽  
Author(s):  
Keisuke Majima ◽  
Ryo Takita ◽  
Akihiro Okada ◽  
Takashi Ohshima ◽  
Masakatsu Shibasaki
Keyword(s):  
Michael Reaction ◽  
Keto Esters ◽  
Catalytic Asymmetric ◽  
Asymmetric Michael Reaction

Enantioselective Michael Reaction of α-Alkyl-β-keto Esters and Enones under Multifunctional Catalysis

2010 ◽  
Vol 12 (22) ◽  
pp. 5218-5221 ◽  
Author(s):  
Juanjuan Yang ◽  
Wenjun Li ◽  
Zhichao Jin ◽  
Xinmiao Liang ◽  
Jinxing Ye
Keyword(s):  
Michael Reaction ◽  
Keto Esters ◽  
Multifunctional Catalysis
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