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The synthesis of annulated pyridazines by cycloaddition of azodicarboxylates to vinyl heterocycles

โœ Scribed by Gurnos Jones; Paul Rafferty

Book ID
118549819
Publisher
Elsevier Science
Year
1979
Tongue
French
Weight
799 KB
Volume
35
Category
Article
ISSN
0040-4020

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Novel Ni(C0)4-promoted tandem cycloadditions of diphenylcyclopropenone to isothiocyanates and to CS2 were found to provide new heterocyclic spirans, pyrroline-2-one-5-Spiro-5 '-thiolene-4'-ones and a thiolene-2-one-5-spiro-S'-thiolene-4'-one, respectively, in moderate yields.