Preparation method of N-substituted dibenzo[a,c]carbazole compound
申请人:DALIAN UNIVERSITY OF TECHNOLOGY
公开号:US10894771B2
公开(公告)日:2021-01-19
Pharmaceutical and chemical intermediates and relevant chemicals, and relates to a novel preparation method of N-substituted dibenzo[a,c]carbazole compound. O-alkynylaniline and derivatives thereof as raw materials conduct a cascade cyclization reaction in an anhydrous organic solvent in the presence of catalysts, oxidants and additives, and are converted into the N-substituted dibenzo[a,c]carbazole compound. The preparation method of the N-substituted dibenzo[a,c]carbazole compound has fewer reaction steps, low cost of raw material, mild reaction conditions and convenient operation. Moreover, the obtained product has high yield and high purity, fully meets the quality requirements for drug intermediates, and provides favorable conditions for the industrial production.
[EN] N-SUBSTITUTED DIBENZOCARBAZOLE COMPOUND, PREPARATION METHOD THEREFOR, AND USES THEREOF<br/>[FR] COMPOSÉ DE DIBENZOCARBAZOLE N-SUBSTITUÉ, SON PROCÉDÉ DE PRÉPARATION ET SES APPLICATIONS<br/>[ZH] 一种N-取代二苯并咔唑类化合物的制备方法
PREPARATION METHOD OF N-SUBSTITUTED DIBENZO[A,C]CARBAZOLE COMPOUND
申请人:DALIAN UNIVERSITY OF TECHNOLOGY
公开号:US20200262790A1
公开(公告)日:2020-08-20
Pharmaceutical and chemical intermediates and relevant chemicals, and relates to a novel preparation method of N-substituted dibenzo[a,c]carbazole compound. O-alkynylaniline and derivatives thereof as raw materials conduct a cascade cyclization reaction in an anhydrous organic solvent in the presence of catalysts, oxidants and additives, and are converted into the N-substituted dibenzo[a,c]carbazole compound. The preparation method of the N-substituted dibenzo[a,c]carbazole compound has fewer reaction steps, low cost of raw material, mild reaction conditions and convenient operation. Moreover, the obtained product has high yield and high purity, fully meets the quality requirements for drug intermediates, and provides favorable conditions for the industrial production.
Pd-Catalyzed cascade cyclization of <i>o</i>-alkynylanilines <i>via</i> C–H/C–N bond cleavage leading to dibenzo[<i>a</i>,<i>c</i>]carbazoles
作者:Sheng Zhang、Hengmin Ma、Hon Eong Ho、Yoshinori Yamamoto、Ming Bao、Tienan Jin
DOI:10.1039/c8ob01386a
日期:——
A new and efficient Pd-catalyzed cascade cyclization of biaryl-tethered o-alkynylanilines for the formation of dibenzo[a,c]carbazole derivatives has been reported.