A novel and efficient synthesis of 3-aminomethyl-N-tosyl-indazoles
摘要:
A practical and environmentally friendly synthesis of 3-aminomethyl-N-tosyl-indazoles is developed. The in situ formed vinyl azines are reacted with amines to furnish amino functionalized anti-hydrazones in excellent yields. Subsequent copper-catalyzed cyclization at ambient temperature is effective and desired compounds are obtained in short reaction times. Also, the formation of bisindazoles is presented for the first time. (C) 2010 Elsevier Ltd. All rights reserved.
A practical and environmentally friendly synthesis of 3-aminomethyl-N-tosyl-indazoles is developed. The in situ formed vinyl azines are reacted with amines to furnish amino functionalized anti-hydrazones in excellent yields. Subsequent copper-catalyzed cyclization at ambient temperature is effective and desired compounds are obtained in short reaction times. Also, the formation of bisindazoles is presented for the first time. (C) 2010 Elsevier Ltd. All rights reserved.