N-quaternary compounds. Part XXXIV. Addition of pyridine-2-thiones to α-bromo-αβ-unsaturated cyclic ketones

1973 ◽  
pp. 2049-2050 ◽  
Author(s):  
Reidar Lie ◽  
Kjell Undheim
Keyword(s):  
Cyclic Ketones ◽  
Quaternary Compounds

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.

Multifunctionalization of Unactivated Cyclic Ketones via an Electrochemical Process: Access to Cyclic α-Enaminones

2019 ◽  
Vol 84 (3) ◽  
pp. 1647-1653 ◽  
Author(s):  
Kangfei Hu ◽  
Peng Qian ◽  
Ji-Hu Su ◽  
Zhibin Li ◽  
Jiawei Wang ◽  
...  
Keyword(s):  
Electrochemical Process ◽  
Cyclic Ketones

Cu-Catalyzed Pyridine Synthesis via Oxidative Annulation of Cyclic Ketones with Propargylamine

2021 ◽  
Author(s):  
Svitlana O. Sotnik ◽  
Andrii I. Subota ◽  
Anton Y. Kliuchynskyi ◽  
Dmytro V. Yehorov ◽  
Anton S. Lytvynenko ◽  
...  
Keyword(s):  
Cyclic Ketones ◽  
Pyridine Synthesis

Levallorphan methyl iodide (SR 58002), a potent narcotic antagonist with peripheral selectivity superior to that of other quaternary compounds

Life Sciences ◽  
1983 ◽  
Vol 33 ◽  
pp. 477-480 ◽  
Author(s):  
M. Dragonetti ◽  
A. Bianchetti ◽  
R. Sacilotto ◽  
A. Giudice ◽  
N. Ferrarese ◽  
...  
Keyword(s):  
Methyl Iodide ◽  
Narcotic Antagonist ◽  
Quaternary Compounds
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