The unusual thermal transformations of the dimethyl 2,2,3,3-tetramethyl-7a-R-1,2,3,7a-tetrahydroimidazo[1,2-b]isoxazole-6,7-dicarboxylate derivatives Full article
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Tetrahedron
ISSN: 0040-4020 |
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| Output data | Year: 2008, Volume: 64, Number: 30-31, Pages: 7432-7436 Pages count : DOI: 10.1016/j.tet.2008.05.038 | ||||||
| Tags | 2,3-dihydroisoxazole; azomethine ylide; rearrangement; 1,2-Sigmatropic shift | ||||||
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Abstract:
Dimethyl 2,2,3,3 -tetramethyl-7 a- R- 1,2,3,7a-tetra hydroimidazo[1,2-b]-isoxazol e-6,7 -dicarboxylate derivatives were shown to undergo thermal rearrangement along two competing routes giving rise to dimethyl 2-(2-R-4,5-dihydro-1H-3 lambda-5-imidazol-3-ylidene)-3-oxosuccinate derivatives and (or) dimethyl-2-oxo-3-(1 -R-imidazolidin-2-ylidene)succinates. The latter undergoes intramolecular cyclization producing, in case of N-unsubstituted derivatives, methyl 5,6-dioxo-l-R-2,3,5,6-tetrahydro-IH-pyrrolo[1,2-alimidazol-7carboxylates. (c) 2008 Elsevier Ltd. All rights reserved.
Cite:
Chukanov N.V.
, Popov S.A.
, Romanenko G.V.
, Reznikov V.A.
The unusual thermal transformations of the dimethyl 2,2,3,3-tetramethyl-7a-R-1,2,3,7a-tetrahydroimidazo[1,2-b]isoxazole-6,7-dicarboxylate derivatives
Tetrahedron. 2008. V.64. N30-31. P.7432-7436. DOI: 10.1016/j.tet.2008.05.038 WOS Scopus РИНЦ OpenAlex
The unusual thermal transformations of the dimethyl 2,2,3,3-tetramethyl-7a-R-1,2,3,7a-tetrahydroimidazo[1,2-b]isoxazole-6,7-dicarboxylate derivatives
Tetrahedron. 2008. V.64. N30-31. P.7432-7436. DOI: 10.1016/j.tet.2008.05.038 WOS Scopus РИНЦ OpenAlex
Dates:
| Published print: | Jul 1, 2008 |
Identifiers:
| Web of science: | WOS:000257619700048 |
| Scopus: | 2-s2.0-45449118467 |
| Elibrary: | 14872214 |
| OpenAlex: | W1969152758 |