ChemInform Abstract: Novel Pyrrolidine-thiohydantoins/thioxotetrahydropyrimidinones as Highly Effective Catalysts for the Asymmetric Michael Addition.

ChemInform ◽  
2011 ◽  
Vol 42 (36) ◽  
pp. no-no
Author(s):  
Christoforos G. Kokotos ◽  
Dimitris Limnios ◽  
Despoina Triggidou ◽  
Maria Trifonidou ◽  
George Kokotos
Keyword(s):  
Michael Addition ◽  
Asymmetric Michael Addition ◽  
Highly Effective

Novel pyrrolidine-thiohydantoins/thioxotetrahydropyrimidinones as highly effective catalysts for the asymmetric Michael addition

2011 ◽  
Vol 9 (9) ◽  
pp. 3386 ◽  
Author(s):  
Christoforos G. Kokotos ◽  
Dimitris Limnios ◽  
Despoina Triggidou ◽  
Maria Trifonidou ◽  
George Kokotos
Keyword(s):  
Michael Addition ◽  
Asymmetric Michael Addition ◽  
Highly Effective

l-Prolinal Dithioacetal: A Highly Effective Organocatalyst for the Direct Nitro-Michael Addition to Selected Cyclic and Aromatic Ketones

Synthesis ◽  
2019 ◽  
Vol 51 (17) ◽  
pp. 3356-3368
Author(s):  
Piotr Pomarański ◽  
Zbigniew Czarnocki
Keyword(s):  
Michael Addition ◽  
Ring Size ◽  
Cyclic Ketones ◽  
Asymmetric Syntheses ◽  
Aromatic Ketones ◽  
Ring Systems ◽  
Effective Catalyst ◽  
Acetophenone Derivatives ◽  
Highly Effective ◽  
Related Compounds

The synthesis of novel l-prolinal dithioacetal and its application as an organocatalyst for the direct Michael addition of cyclic ketones and acetophenone derivatives to trans-β-nitrostyrene and related compounds is described. The prolinal dithioacetal acts as effective catalyst in the case of cyclic ketones of different ring size, in particular five- and six-membered examples, as well as larger and smaller ring systems. High enantioselectivity and diastereoselectivity is observed for different substrates and trans-β-nitrostyrenes. Also, the first asymmetric syntheses of selected 2-methyl-4-nitro-1,3-diphenylbutan-1-one derivatives by application of the obtained organocatalyst is presented.

Pyrrolidinyl-Camphor Derivatives as a New Class of Organocatalyst for Direct Asymmetric Michael Addition of Aldehydes and Ketones to β-Nitroalkenes

2010 ◽  
Vol 16 (23) ◽  
pp. 7030-7038 ◽  
Author(s):  
Ying-Fang Ting ◽  
Chihliang Chang ◽  
Raju Jannapu Reddy ◽  
Dhananjay R. Magar ◽  
Kwunmin Chen
Keyword(s):  
Michael Addition ◽  
New Class ◽  
Asymmetric Michael Addition ◽  
Aldehydes And Ketones ◽  
Camphor Derivatives

ChemInform Abstract: Asymmetric Michael Addition of Ketones to Nitroolefins: Pyrrolidinyl-oxazole-carboxamides as New Efficient Organocatalysts.

ChemInform ◽  
2015 ◽  
Vol 46 (12) ◽  
pp. no-no
Author(s):  
Ahmed Kamal ◽  
Manda Sathish ◽  
Vunnam Srinivasulu ◽  
Jadala Chetna ◽  
Kunta Chandra Shekar ◽  
...  
Keyword(s):  
Michael Addition ◽  
Asymmetric Michael Addition

scholarly journals Synthesis of new pyrrolidine-based organocatalysts and study of their use in the asymmetric Michael addition of aldehydes to nitroolefins

2017 ◽  
Vol 13 ◽  
pp. 612-619 ◽  
Author(s):  
Alejandro Castán ◽  
Ramón Badorrey ◽  
José A Gálvez ◽  
María D Díaz-de-Villegas
Keyword(s):  
Michael Addition ◽  
Bulky Substituent ◽  
Asymmetric Michael Addition ◽  
Iodination Reaction ◽  
Chiral Imines ◽  
New Compounds ◽  
The Michael Addition

New pyrrolidine-based organocatalysts with a bulky substituent at C2 were synthesized from chiral imines derived from (R)-glyceraldehyde acetonide by diastereoselective allylation followed by a sequential hydrozirconation/iodination reaction. The new compounds were found to be effective organocatalysts for the Michael addition of aldehydes to nitroolefins and enantioselectivities up to 85% ee were achieved.

Asymmetric Michael Addition Induced by (R)-tert-Butanesulfinamide and Syntheses of Chiral Pyrazolidinone Derivatives

2016 ◽  
Vol 81 (21) ◽  
pp. 10506-10516 ◽  
Author(s):  
Hong-Xiu Huang ◽  
Hui-Jing Wang ◽  
Ling Tan ◽  
Shu-Qing Wang ◽  
Pei Tang ◽  
...  
Keyword(s):  
Michael Addition ◽  
Asymmetric Michael Addition

ChemInform Abstract: Catalytic Asymmetric Michael Addition of Nitromethane to Enones Controlled by (R)-LPB.

ChemInform ◽  
2010 ◽  
Vol 29 (52) ◽  
pp. no-no
Author(s):  
K. FUNABASHI ◽  
Y. SAIDA ◽  
M. KANAI ◽  
T. ARAI ◽  
H. SASAI ◽  
...  
Keyword(s):  
Michael Addition ◽  
Asymmetric Michael Addition ◽  
Catalytic Asymmetric

ChemInform Abstract: Asymmetric Michael Addition of Thiols to β-Nitrostyrenes Using a Novel Phenylpyrrolidine-Based Urea Catalyst.

ChemInform ◽  
2015 ◽  
Vol 46 (22) ◽  
pp. no-no
Author(s):  
Souichirou Kawazoe ◽  
Kazuki Yoshida ◽  
Yuichi Shimazaki ◽  
Takeshi Oriyama
Keyword(s):  
Michael Addition ◽  
Asymmetric Michael Addition
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