-
[show abstract]
[hide abstract]
ABSTRACT: A reaction of tetrahydropyridines, obtained by the Diels-Alder reaction from α,β-unsat-urated N,N-dimethylhydrazones and methyl acrylate, with acetylenes activated with the trifluoroacetyl group has been studied and found
to lead to polysubstituted trifluoroacylated tetrahydroazocines. No cyclobutene intermediates have been detected.
Key wordstrifluoroacetylacetylenes-tetrahydropyridines-[2+2] cycloaddition-ring expansion-tetrahydroazocines
Russian Chemical Bulletin 05/2012; 59(5):1010-1013. · 0.38 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Halogenated trifluoroacetylacetylenes have been synthesized for the first time. It was shown that they undergo formally forbidden
by the orbital-symmetry rules [2+2] cycloaddition reactions with nonactivated alkenes in the absence of light and catalyst.
A possible mechanism for this transformation is suggested.
Key wordstrifluoroacetylacetylenes-[2+2] cycloaddition reactions-ene reactions
Russian Chemical Bulletin 05/2012; 58(7):1431-1437. · 0.38 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Ethyl 4-chloro-2-oxobut-3-ynoate has been synthesized for the first time and its addition to alkyl vinyl ethers of various
structures has been studied.
Russian Chemical Bulletin 05/2012; 57(7):1568-1570. · 0.38 Impact Factor
-
Doklady Chemistry 04/2012; 432(1):133-135. · 0.31 Impact Factor
-
Doklady Chemistry - DOKL CHEM. 01/2008; 420(2):147-149.
-
Doklady Chemistry 09/2005; 404(4):210-211. · 0.31 Impact Factor
-
Doklady Chemistry 08/2005; 404(1):174-177. · 0.31 Impact Factor
-
Doklady Chemistry 10/2002; 387(1):289-292. · 0.31 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: Unusual cascade cycloaddition reactions with dimethylhydrazones of -trimethylsilyloxyalkylacroleins acting as azadienes were found. Depending on the nature of the dienophile, the reactions give either fused heterocyclic compounds (when two consecutive Diels—Alder reactions take place) or azabicyclic compounds, resulting from the [2+4]- and [2+3]-cycloaddition cascade.
Russian Chemical Bulletin 01/2002; 51(2):326-331. · 0.38 Impact Factor
-
Organic Preparations and Procedures International 01/1998; 30:447. · 1.01 Impact Factor