Synthesis of quinolin-2-ones by an intramolecular Knoevenagel condensation and by tandem Michael–Knoevenagel heterocyclization
摘要:
The synthesis of 2-(N-R-amino)- and 2-(N-vinylcarbonylamino)acylbenzenes has been carried out and their heterocyclization into quinolin-2-ones under the action of sodium ethylate has been studied.
A new effective route for the synthesis of substituted 2h-indazoles
摘要:
A two-stage synthesis of 2H-indazoles has been established, based on consecutive reactions of reduction of 2-alkyl-, 2-cyclopropyl-, and 2-arylcarbonylazobenzenes to phenylazo-substituted benzyl alcohols and intramolecular heterocyclization of the reduction products under the influence of organic acids.