Synthesis of formyl and carboxy derivatives of heterocycles by modification of 2-(2-aminovinyl)- benzofuran-5,6-dicarbonitriles
摘要:
Procedures have been developed for the synthesis of 2-formylbenzofuran-5,6-dicarbonitriles, 5,6-dicyanobenzofuran-2-carboxylic acids, and formyldibenzo[b,d]furan-2,3-dicarbonitriles by modification of 2-(2-aminovinyl)benzofuran-5,6-dicarbonitriles with sodium periodate or Vilsmeier reagent.
Synthesis of 2-oxo- and 2-thioxo-5-(benzofuran-2-yl)tetrahydropyrimidines
摘要:
New 5,6-dicyanobenzofurans bearing a 2-(thi)oxotetrahydropyrimidine moiety at the 2-position were synthesized from 2-(2-dimethylaminovinyl)-5,6-dicyanobenzofurans, benzaldehydes and (thio)urea in AcOH.