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Abstract At 60 °C in DMSO, the iodine-catalyzed reaction of 3-aminopyrazine-2-carbohydrazide and 2-(arylethynyl)benzaldehydes led hydrazones. Increasing the reaction temperature to 100 °C, the amino and amido still indicated inactive, only the imine… Click to show full abstract
Abstract At 60 °C in DMSO, the iodine-catalyzed reaction of 3-aminopyrazine-2-carbohydrazide and 2-(arylethynyl)benzaldehydes led hydrazones. Increasing the reaction temperature to 100 °C, the amino and amido still indicated inactive, only the imine took part in the addition of acetylene bond to give 2-arylisoquinolines in high yields with the cleavage of N-N bond unexpectedly under metal-free conditions.
Keywords:
iodine catalyzed;
aminopyrazine carbohydrazide;
reaction aminopyrazine;
carbohydrazide arylethynyl;
reaction;
catalyzed reaction
Journal Title: Tetrahedron
Year Published: 2018
Link to full text (if available)
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Journal Title: Tetrahedron
Year Published: 2018
Link to full text (if available)
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recommendations!