nucleophilic vinyl substitution
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ChemInform ◽  
2010 ◽  
Vol 32 (43) ◽  
pp. no-no
Author(s):  
V. P. Litvinov ◽  
Ya. Yu. Yakunin ◽  
V. D. Dyachenko

2010 ◽  
Vol 63 (8) ◽  
pp. 1267 ◽  
Author(s):  
Jinying Liu ◽  
Xiaolan Fu ◽  
Yang Zhou ◽  
Guangyuan Zhou ◽  
Yongjiu Liang ◽  
...  

A facile and divergent synthesis of substituted pyridine-2,4(1H,3H)-diones and 4H-thiopyran-4-ones from readily available α-alkenoyl-α-carbamoyl ketene-S,S-acetals has been developed. Subjected to N,N-dimethylformamide at 125°C, α-alkenoyl-α-carbamoyl ketene-S,S-acetals underwent an intramolecular aza-nucleophilic vinyl substitution reaction, a formal [5C + 1N] annulation, to give the corresponding substituted pyridine-2,4(1H,3H)-diones in high yields, whereas in the presence of Na2S·9H2O in DMF at 75°C, tandem intermolecular and intramolecular thia-nucleophilic vinyl substitution reactions, a formal [5C + 1S] annulation, occurred to produce the corresponding substituted 4H-thiopyran-4-ones in good yields.


ChemInform ◽  
2000 ◽  
Vol 31 (38) ◽  
pp. no-no
Author(s):  
Z. F. Pavlova ◽  
E. S. Lipina ◽  
Ya. A. Kasem ◽  
N. V. Kuz'mina

1984 ◽  
Vol 15 (35) ◽  
Author(s):  
N. P. PETUKHOVA ◽  
N. E. DONTSOVA ◽  
E. N. PRILEZHAEVA ◽  
V. S. BOGDANOV

Author(s):  
E. A. Berdnikov ◽  
A. A. Vafina ◽  
V. L. Polushina ◽  
R. M. Zaripova ◽  
F. R. Tantasheva ◽  
...  

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