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A selective synthesis of 2-hydroxy-4′-hydroxybenzophenones or their 3′-acylated counterparts through the cascade reactions of 3-formylchromones with diversely substituted penta-3,4-dien-2-ones is presented. Mechanistically, the formation of the title compounds involves either… Click to show full abstract
A selective synthesis of 2-hydroxy-4′-hydroxybenzophenones or their 3′-acylated counterparts through the cascade reactions of 3-formylchromones with diversely substituted penta-3,4-dien-2-ones is presented. Mechanistically, the formation of the title compounds involves either an unprecedented [4 + 2] annulation or a well defined [3 + 3] cyclization depending on the substitution patterns of the penta-3,4-dien-2-one substrates.
Keywords:
annulation;
hydroxy hydroxybenzophenones;
dien ones;
selective syntheses;
penta dien;
diversely substituted
Journal Title: Organic chemistry frontiers
Year Published: 2017
Link to full text (if available)
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Journal Title: Organic chemistry frontiers
Year Published: 2017
Link to full text (if available)
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recommendations!