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A synthesis of annulated pyridazines by cycloaddition of azodicarboxylates to vinylpyridines

✍ Scribed by Gurnos Jones; Paul Rafferty

Publisher
Elsevier Science
Year
1978
Tongue
French
Weight
141 KB
Volume
19
Category
Article
ISSN
0040-4039

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Synthesis of metallated (metal = Si, Ge,
Synthesis of metallated (metal = Si, Ge, Sn) pyridazines by cycloaddition of metal substituted alkynes to 1,2,4,5-tetrazine
✍ Dieter K Heldmann; JΓΌrgen Sauer πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 French βš– 218 KB

MR3-substituted alkynes 2 and 3 (M = Si, Ge, Sn; R = alkyl) show high reactivity in inverse-type Diels-Alder reactions with the ~-electron-deficient 1,2,4,5-tetrazine 1 in strict contrast to the corresponding carbon compounds. Kinetic data prove the huge accelerating effect of the trialkyltin substi