direct synthesis of 3-substituted-2H-indazole derivatives was developed in the presence of AgNO3/Na2S2O8 under mild reaction conditions. The reaction affords a series of 1,3-dicarbonyl-2H-indazoles products with yields of up to 82%. The mechanism of the strategy suggests that the reaction proceeds through a radical pathway. Moreover, this strategy provides a new protocol for the synthesis of functionalized
在温和的反应条件下,在 AgNO 3 /Na 2 S 2 O 8存在下,开发了一种直接合成 3-取代-2 H-吲唑衍生物的便捷策略。该反应提供了一系列 1,3-二羰基-2 H-吲唑产物,产率高达 82%。该策略的机制表明反应通过自由基途径进行。此外,该策略为功能化 2 H-吲唑的合成提供了新的方案。
[EN] VIRAL POLYMERASE INHIBITORS<br/>[FR] INHIBITEURS DE POLYMERASE VIRALE
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2009018657A1
公开(公告)日:2009-02-12
Compounds of formula I: wherein X, R2, R3, R5 and R6 are defined herein, are useful as inhibitors of the hepatitis C virus NS5B polymerase.
Dichlorobis(triphenylphosphine)palladium–tin(II) chloride system effectively catalyses the selective transformation of N-(2-nitrobenzylidene)amines into the corresponding 2H-indazole derivatives under carbon monoxide via a reductive N-heterocyclization reaction.
Selective N2-Alkylation of 1H-Indazoles and 1H-Azaindazoles
作者:Allyn T. Londregan、Jennifer Clemens、Emily L. Bell
DOI:10.1055/s-0040-1719917
日期:2022.7
A general and selective procedure for the N2-alkylation of 1H-indazoles and 1H-azaindazoles is presented. Promoted by either trifluoromethanesulfonic acid or copper(II) triflate, diverse 1H-indazoles/azaindazoles are selectively alkylated with varied primary, secondary, and tertiary alkyl 2,2,2-trichloroacetimidates at the N2-nitrogen to afford the corresponding 2-alkyl-2H-indazoles/azaindazoles. Forty-one
The present invention provides compounds of Formula (I), pharmaceutical compositions thereof, and method of using the same in the treatment or prevention of diseases mediated by the activation of β3-adrenoceptor.