A procedure has been developed for synthesis of 2-alkenyl-2H-indazoles starting from 2-(2-carbonylmethyl)-2H-indazoles, which are prepared by gallium/aluminium- and aluminium-mediated, direct, regioselective alkylation of indazoles with α-bromocarbonyl compounds. The structure of 3-(2H-indazol-2-yl)-2H-chromen-2-one was proven by X-ray crystallography. The styrene- and coumarin-2H-indazoles produced
已经开发了一种以 2-(2-羰基甲基)-2H-吲唑为原料合成 2-烯基-2H-吲唑的方法,该方法是通过镓/铝和铝介导的吲唑与 α 的直接区域选择性烷基化反应制备的。 -溴羰基化合物。3-(2H-indazol-2-yl)-2H-chromen-2-one 的结构已通过 X 射线晶体学证明。发现使用新方法生产的苯乙烯-和香豆素-2H-吲唑具有有趣的荧光特性。
Amino Acid Derivatives, VII [1]: Synthesis and Antiviral Evaluation of α-Amino Acid Esters Bearing an Indazole Side Chain
作者:Adel A.-H. Abdel-Rahman
DOI:10.1007/s00706-007-0770-7
日期:2008.3
A series of peptide and dipeptide derivatives conjugated with an indazole residue were synthesized. The new compounds were evaluated in vitro for cytotoxicity against Hepatitis-A virus (HAV-27), Herpes Simplex virus-1 ( HSV -1), and Hepatitis-B virus (HBV) and showed moderate to high activity.
Selective alkylation of indazoles is still a highly challenging topic in chemistry and the synthesis of important molecules. Herein, a novel highly selective N2-alkylation of indazoles with diazo compounds is described in the presence of TfOH. Unlike the traditional metal- and base-catalysed version, this protocol highlights the regioselectivity of alkylation of indazoles and a metal-free catalysis
吲唑的选择性烷基化仍然是化学和重要分子合成中极具挑战性的课题。在此,描述了在 TfOH 存在下,吲唑与重氮化合物的新型高选择性N 2 -烷基化。与传统的金属和碱催化版本不同,该方案突出了吲唑烷基化的区域选择性和无金属催化体系,以高区域选择性( N 2 / N 1高达 100/0) 和出色的官能团耐受性。此外,成功地进行了克级合成以产生相应的产物。通过控制实验进行的机械研究提供了合理的机械建议。
Substituted β-Aminoethylindazoles
作者:C. Ainsworth
DOI:10.1021/ja01537a055
日期:1958.2
v. Auwers; Allardt, Chemische Berichte, 1926, vol. 59, p. 98