KETOBENZOFURAN DERIVATIVES, METHOD FOR SYNTHESIZING SAME, AND INTERMEDIATES
申请人:BAILLY Frederic
公开号:US20130012729A1
公开(公告)日:2013-01-10
The present disclosure relates to ketobenzofuran derivatives of the general formula (I):
as well as to a method of synthesizing the same by coupling a quinonimine and an enaminone by a Nenitzescu reaction and to the intermediates of the synthesis thereof.
PROCESS FOR SYNTHESIZING KETO-BENZOFURAN DERIVATIVES
申请人:Grimaud Bernard
公开号:US20140018553A1
公开(公告)日:2014-01-16
The invention relates to a process for synthesizing benzofuran derivatives, in particular dronedarone of formula (D), comprising a step of Friedel-Crafts acylation starting from a sulfonamido-benzofuran ester intermediate.
Reaction of N-sulfonyl-1,4-benzoquinone imines with enamines
作者:S. A. Konovalova、A. P. Avdeenko、V. V. Pirozhenko、A. L. Yusina、G. V. Palamarchuk、S. V. Shishkina
DOI:10.1134/s1070428017040054
日期:2017.4
4-benzoquinone imine reacted with enamines to give 1,4-addition products and products of their subsequent cyclization, substituted 5-aminobenzofurans and 5-aminoindoles, depending on the solvent nature, electron-withdrawing power of the substituent on the quinone imine nitrogen atom, and enamine structure. The presence of strong electron-withdrawing trifluoromethanesulfonyl group on the quinone imine nitrogen
Process for the preparation of 3-aroyl-5-aminobenzofuran derivatives
申请人:LEK Pharmaceuticals d.d.
公开号:EP2452938A1
公开(公告)日:2012-05-16
The present invention relates to a process for the preparation of 3-aroyl-5-aminobenzofuran derivatives useful as antiarrhythmic drugs which avoids the use of nitro intermediates.
Reaction of N-sulfonyl derivatives of 1,4-benzoquinone monoimine with substituted hydrazines
作者:S. A. Konovalova、A. P. Avdeenko、S. A. Goncharova、V. V. D’yakonenko、S. V. Shishkina
DOI:10.1134/s1070428016050055
日期:2016.5
Reaction direction of N-sulfonyl derivatives of 1,4-benzoquinone monoimine with substituted hydrazines depends on the redox potential of the quinone imine and on the basicity of the hydrazine. Aryl (alkyl)hydrazines of high basicity favor the reduction of quinone monoimine. In reactions with less basic aroylhydrazones N'-(4-oxocyclohexa-2,5-dienylidene)aroylhydrazides were obtained only from the alkylsubstituted