Pd-Catalyzed Intramolecular Aerobic Oxidative C–H Amination of 2-Aryl-3-(arylamino)quinazolinones: Synthesis of Fluorescent Indazolo[3,2-b]quinazolinones
摘要:
A palladium-catalyzed intramolecular aerobic oxidative C-H amination of 2-aryl-3-(arylamino)quinazolinones has been developed, providing a variety of substituted indazolo[3,2-b]quinazolinone derivatives in moderate to excellent yields. Preliminary mechanistic studies suggested that a palladacycle dimer could be the key intermediate, which underwent a cascade "rollover" cyclometalation and C-H amination sequence. Furthermore, the potential utility of these products has been demonstrated as a new class of blue fluorophores for fluorescent materials.
The present invention relates to quinazolinone compounds useful as modulators of TGR5 and methods for the treatment or prevention of metabolic, cardiovascular, and inflammatory diseases.
Palladium-Catalyzed Cascade Reaction of 2-Amino-<i>N</i>′-arylbenzohydrazides with Triethyl Orthobenzoates To Construct Indazolo[3,2-<i>b</i>]quinazolinones
A palladium-catalyzed sequential cyclization/C-H activation cascade reaction of 2-amino-N'-arylbenzohydrazides with triethyl orthobenzoates has been developed, providing indazolo[3,2-b]quinazolinones in good to high yields. Two key intermediates of the reaction, 2-phenyl-3-(phenylamino)quinazolinone and C-H insertion palladacycle, were isolated, and their structures were unambiguously confirmed by X-ray crystallography. This method represents an unprecedented example of a halogen-free protocol to access indazolo[3,2-b]quinazolinones. Moreover, this chemistry also provides a useful tool for the discovery of fluorescent materials.
ABOUL-ENEIN M. N.; EID A. I., PHARMAC. ACTA HELV., 1981, 56, NO 8, 239-240
作者:ABOUL-ENEIN M. N.、 EID A. I.
DOI:——
日期:——
[EN] QUINAZOLINONE MODULATORS OF TGR5<br/>[FR] MODULATEURS QUINAZOLINONES DE TGR5
申请人:KALYPSYS INC
公开号:WO2008067219A2
公开(公告)日:2008-06-05
[EN] The present invention relates to quinazolinone compounds useful as modulators of TGR5 and methods for the treatment or prevention of metabolic, cardiovascular, and inflammatory diseases. [FR] Cette invention concerne des composés quinazolinones utilisés en tant que modulateurs de TGR5 ainsi que des méthodes permettant de traiter ou de prévenir des maladies métaboliques, cardiovasculaires et inflammatoires.