54449-00-2Relevant academic research and scientific papers
Efficient synthesis of 2-aryl-2: H -indazoles by base-catalyzed benzyl C-H deprotonation and cyclization
Gao, Wen-Xia,Jin, Guo-Qing,Liu, Miao-Chang,Wu, Hua-Yue,Zhou, Yun-Bing
, p. 14617 - 14620 (2020/12/02)
A straightforward and efficient method for the preparation of 2-aryl-2H-indazoles from ortho-alkyl substituted azoxybenzenes is presented. The reaction proceeds through base-catalyzed benzyl C-H deprotonation and cyclization to afford 2-aryl-2H-indazoles
Room-Temperature, Metal-Free, and One-Pot Preparation of 2H-Indazoles through a Mills Reaction and Cyclization Sequence
Kondo, Masaru,Takizawa, Shinobu,Jiang, Yuzhao,Sasai, Hiroaki
supporting information, p. 9866 - 9869 (2019/07/10)
The Mills reaction and cyclization of readily available 2-aminobenzyl alcohols and nitrosobenzenes using thionyl bromide provided 2H-indazoles in up to 88 % yields. In the metal-free process, acetic acid played a crucial role for the both Mills reaction and cyclization. A brominated 2H-indazole could also be obtained through the one-pot sequence.
Intramolecular Cyclization of Iminoxyl Radicals
Atmaram, Shiravanate,Forrester, Alexander R.,Gill, Melvyn,Napier, Russell J.,Thomson, Ronald H.
, p. 641 - 648 (2007/10/02)
Iminyl radicals, generated by oxidation of the corresponding O-carboxymethoximes with persulfate, do not cyclise onto an ajacent azo group but the structurally related iminoxyls cyclise to give indazoles.ESR evidence is presented for the intramolecular ad
