Issue 12, 2012

One-pot synthesis of 1-alkyl-1H-indazoles from 1,1-dialkylhydrazones viaaryne annulation

Abstract

The reaction of readily accessible 1,1-dialkylhydrazones with commercially available o-(trimethylsilyl)aryl triflates provides a direct one-step route to pharmaceutically important 1-alkylindazoles. The products are obtained in high yields by one-pot NCS-chlorination/aryne annulation or Ac2O-acylation/deprotection/aromatization protocols.

Graphical abstract: One-pot synthesis of 1-alkyl-1H-indazoles from 1,1-dialkylhydrazones via aryne annulation

Supplementary files

Article information

Article type
Paper
Submitted
16 Dec 2011
Accepted
16 Jan 2012
First published
17 Jan 2012

Org. Biomol. Chem., 2012,10, 2409-2412

One-pot synthesis of 1-alkyl-1H-indazoles from 1,1-dialkylhydrazones via aryne annulation

N. A. Markina, A. V. Dubrovskiy and R. C. Larock, Org. Biomol. Chem., 2012, 10, 2409 DOI: 10.1039/C2OB07117G

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