C-Alkylation of heterocyclic enamines

1978 ◽  
Vol 43 (3) ◽  
pp. 884-888 ◽  
Author(s):  
Otakar Červinka ◽  
Anna Fábryová ◽  
Hana Chudobová
Keyword(s):  
Heterocyclic Enamines

A Direct Retro-Reformatsky Fragmentation:  Formal Ring Enlargement of Cyclic Ketones for Novel and Practical Synthesis of Heterocyclic Enamines

2004 ◽  
Vol 69 (3) ◽  
pp. 997-1000 ◽  
Author(s):  
Mei-Xin Zhao ◽  
Mei-Xiang Wang ◽  
Chu-Yi Yu ◽  
Zhi-Tang Huang ◽  
George W. J. Fleet
Keyword(s):  
Cyclic Ketones ◽  
Ring Enlargement ◽  
Practical Synthesis ◽  
Heterocyclic Enamines

Tandem nitrosation/cycloaddition of heterocyclic enamines using nitrolic acids

2009 ◽  
Vol 50 (34) ◽  
pp. 4919-4921 ◽  
Author(s):  
Cevher Altuğ ◽  
Yasar Dürüst ◽  
Mark C. Elliott ◽  
Benson M. Kariuki
Keyword(s):  
Nitrolic Acids ◽  
Heterocyclic Enamines

Highly stereoselective ring contraction of heterocyclic enamines: total synthesis of perhydrohistrionicotoxin and its 2,6-epimer

1989 ◽  
Vol 54 (18) ◽  
pp. 4419-4425 ◽  
Author(s):  
Pierre Duhamel ◽  
Mitsuharu Kotera ◽  
Thierry Monteil ◽  
Benoit Marabout ◽  
Daniel Davoust
Keyword(s):  
Total Synthesis ◽  
Ring Contraction ◽  
Heterocyclic Enamines

Synthesis of Acetyl-Substituted Heterocyclic Enamines and Their Reaction with Diethyl Azodicarboxylate

1995 ◽  
Vol 25 (9) ◽  
pp. 1339-1351 ◽  
Author(s):  
Ying Cheng ◽  
Min Zhao ◽  
Mei-Xiang Wang ◽  
Li-Ben Wang ◽  
Zhi-Tang Huang
Keyword(s):  
Diethyl Azodicarboxylate ◽  
Heterocyclic Enamines

ChemInform Abstract: REACTIONS WITH HETEROCYCLIC ENAMINES. SYNTHESIS OF NEW ISOXAZOLE DERIVATIVES

1983 ◽  
Vol 14 (26) ◽  
Author(s):  
E. M. ZAYED ◽  
M. A. E. KHALIFA ◽  
L. I. IBRAHEIM ◽  
M. H. ELNAGDI
Keyword(s):  
Isoxazole Derivatives ◽  
Heterocyclic Enamines

Domino Reactions of Chromones with Heterocyclic Enamines

Synlett ◽  
2021 ◽  
Author(s):  
Peter Langer
Keyword(s):  
Carbon Atom ◽  
Carbonyl Group ◽  
Functional Groups ◽  
Conjugate Addition ◽  
Heterocyclic Ring ◽  
Ring Cleavage ◽  
Domino Reactions ◽  
Chromone Derivatives ◽  
Convenient Synthesis ◽  
Heterocyclic Enamines

AbstractDomino reactions of heterocyclic enamines with chromone derivatives provides a convenient synthesis of a great variety of annulated heterocyclic ring systems. The course of the reaction depends on the type of substituent located at position 3 of the chromone. Reactions of 3-unsubstituted chromones, 3-nitrochromones, and 3-halochromones proceed by conjugate addition of the carbon atom of the enamine to carbon C-2 of the chromone, ring cleavage, and recyclization via the chromone carbonyl group. In the case of 3-formylchromes, 3-dichloroacetylchromone, 3-perfluoroalkanoylthiochromones, 3-(2-fluorobenzoyl)chromones, and 3-methoxalylchromones the final cyclization proceeds via the carbonyl group located outside the chromone moiety. The functional groups located at the carbonyl group at position 3 of the chromone allow for further synthetic transformations including additional ring closures.Contents1 Introduction2 3-Unsubstituted Chromones3 3-Nitrochromones4 3-Formylchromes5 3-Dichloroacetylchromone6 3-Perfluoroalkanoylthiochromones7 3-Methoxalylchromones8 3-(2-Fluorobenzoyl)chromones9 3-Halochromones10 Chromone-3-carboxylic Acids11 Conclusions

Studies on heterocyclic enamines: New syntheses of 4H-pyranes, pyranopyrazoles and pyranopyrimidines

1987 ◽  
Vol 24 (6) ◽  
pp. 1677-1681 ◽  
Author(s):  
Mohamed Hilmy Elnagdi ◽  
Ramadan Maawad Abdel-Motaleb ◽  
Mona Mustafa ◽  
Mohamed Foad Zayed ◽  
Eman Moustafa Kamel
Keyword(s):  
Heterocyclic Enamines

Reactions with Heterocyclic Enamines Synthesis of New Isoxazole Derivatives

1983 ◽  
Vol 316 (2) ◽  
pp. 105-110 ◽  
Author(s):  
Ezzat M. Zayed ◽  
Mohamed A. E. Khalifa ◽  
Laila I. Ibraheim ◽  
Mohamed H. Elnagdi
Keyword(s):  
Isoxazole Derivatives ◽  
Heterocyclic Enamines

Nucleophilic Reaction of Heterocyclic Enamines with Nitrile imine 1,3-Dipoles

2000 ◽  
Vol 30 (18) ◽  
pp. 3255-3265 ◽  
Author(s):  
Wei-Shi Miao ◽  
Feng Xiong ◽  
Mei-Xiang Wang ◽  
Zhi-Tang Huang
Keyword(s):  
Nucleophilic Reaction ◽  
Nitrile Imine ◽  
Heterocyclic Enamines
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