Preparation and inverse electron demand Diels-Alder reactions of 3-methoxy-6-methylthio-1,2,4,5-tetrazine
β Scribed by Subas M. Sakya; Kelley K. Groskopf; Dale L. Boger
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- French
- Weight
- 202 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
The selective preparation of 3-methoxy-6-methylthio-l,2,4,5-tetrazine (2) and 3,6-dimethoxy-l,2,4,5-tetrazine (3) from 3,6Β°bis(methylthio)-l,2,4,5-tetrazine (1) is described. A preliminary investigation into the participation of 2 in [4+2] cycloaddition reactions with electron rich and neutral dienophiles along with the resulting regioselective formation of the products (5) are discussed.
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The syntheses of novel lricyclic diazo carbapenem precursor 17, and the deprotected carbapenems 2 and 3 are described. The construction of the tricyclic carbapenem was accomplished by an intramolecular nucleophilic substitution of the diazine sulfone 16 which was obtained from an inverse electron de
Inverse Electron Demand Diels-Alder Reactions of 3,6-Dichloro-[1,2,4,5]tetrazine. -Tetrazine (I) is used as an azadiene equivalent for inverse electron demand Diels -Alder reactions with alkynes and alkenes to give functionalized dichloropyridazines, e.g. (III), (V), and (VII). -(SPAREY, T.
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