902131-33-3Relevant academic research and scientific papers
Synthesis of 8-substituted-6-phenyl-6,7,8,9-tetrahydro-3H-pyrazolo[4,3-f]isoquinolines using Pictet-Spengler and Bischler-Napieralski cyclisation methods
Davies, Robert D.M.,Pink, Jennifer H.,Scott, James S.,Bailey, Andrew
, p. 2917 - 2920 (2018)
In the following communication we report routes for the synthesis of a set of 8-substituted-6-phenyl-6,7,8,9-tetrahydro-3H-pyrazolo[4,3-f]isoquinolines. Pictet-Spengler and Bischler-Napieralski methodologies were employed on the relevant indazole precursors and the merits of the two cyclisation reactions for preparing these structures were assessed.
Structure-activity studies of a novel series of 5,6-fused heteroaromatic ureas as TRPV1 antagonists
Drizin, Irene,Gomtsyan, Arthur,Bayburt, Erol K.,Schmidt, Robert G.,Zheng, Guo Zhu,Perner, Richard J.,DiDomenico, Stanley,Koenig, John R.,Turner, Sean C.,Jinkerson, Tammie K.,Brown, Brian S.,Keddy, Ryan G.,McDonald, Heath A.,Honore, Prisca,Wismer, Carol T.,Marsh, Kennan C.,Wetter, Jill M.,Polakowski, James S.,Segreti, Jason A.,Jarvis, Michael F.,Faltynek, Connie R.,Lee, Chih-Hung
, p. 4740 - 4749 (2007/10/03)
Novel 5,6-fused heteroaromatic ureas were synthesized and evaluated for their activity as TRPV1 antagonists. It was found that 4-aminoindoles and indazoles are the preferential cores for the attachment of ureas. Bulky electron-withdrawing groups in the para-position of the aromatic ring of the urea substituents imparted the best in vitro potency at TRPV1. The most potent derivatives were assessed in in vivo inflammatory and neuropathic pain models. Compound 46, containing the indazole core and a 3,4-dichlorophenyl group appended to it via a urea linker, demonstrated in vivo analgesic activity upon oral administration. This derivative also showed selectivity versus other receptors in the CEREP screen and exhibited acceptable cardiovascular safety at levels exceeding the therapeutic dose.
