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A diagram is presented of ZrCl4-catalyzed synthesis of the derivatives of 4-(2-hydroxyphenyl)pyrazolo[3,4-b]pyridine.

The article presents chemical equations related to synthesis of benzopyran derivatives which includes di-aromatic fused [3.3.1] bicyclic compounds' facile synthesis and phase-transfer caytalysis, published in the volume 11 of 2013 issue of the journal "Organic & Biomolecular Chemistry."

Depending on the conditions, the reactions provide the title systems selectively. [ABSTRACT FROM AUTHOR]

α-Bromination of aromatic methyl ketones (I) followed by cyclization with thiourea derivatives (II) affords aminothiazole derivatives (III) in moderate to good yields. [ABSTRACT FROM AUTHOR]

The copper-catalyzed reaction of isatins (I) with 2-bromopyridines (II) leads to a variety of pyrido-fused quinazolinones (III). [ABSTRACT FROM AUTHOR]

A novel and convenient one-pot protocol for the synthesis of quinoxaline derivatives is developed starting from simple ketones and phenylenediamines. [ABSTRACT FROM AUTHOR]