290367-99-6Relevant articles and documents
Suzuki-type cross-coupling reaction of unprotected 3-iodoindazoles with pinacol vinyl boronate: An expeditive C-3 vinylation of indazoles under microwave irradiation
Vera, Gonzalo,Diethelm, Benjamín,Terraza, Claudio A.,Recabarren-Gajardo, Gonzalo
, (2018)
Herein we report an expeditive C-3 vinylation of unprotected 3-iodoindazoles under microwave irradiation. Ten C-5 substituted 3-vinylindazole derivatives, nine of them novel, were synthesized through this method, which proceeds in moderate to excellent yields starting from C-5 substituted 3-iodoindazole derivatives. In all cases, the C-3 vinylated derivative was the only isolated product. This methodology allows access to 3-vinylated indazoles selectively and directly without the need of N-protection. 3-Vinylindazoles could be interesting synthetic intermediates allowing access to biologically active molecules.
Synthesis of 1,3-diarylsubstituted indazoles utilizing a Suzuki cross-coupling/deprotection/N-arylation sequence
Salovich, James M.,Lindsley, Craig W.,Hopkins, Corey R.
supporting information; experimental part, p. 3796 - 3799 (2010/08/07)
Herein we report a general synthesis of 1,3-diarylsubstituted indazoles utilizing a two-step Suzuki crosscoupling/deprotection/N-arylation sequence. This procedure proceeds in excellent overall yield starting from the 3-iodo-N-Boc indazole derivative allowing for rapid access to these compounds.
Synthesis of new dehydro 2-azatryptophans and derivatives via Heck cross-coupling reactions of 3-iodoindazoles with methyl 2-(acetylamino)acrylate
Crestey, Francois,Collot, Valerie,Stiebing, Silvia,Rault, Sylvain
, p. 3506 - 3514 (2008/02/10)
This paper describes the Heck cross-coupling reaction of 3-iodoindazoles with methyl 2-(acetylamino)acrylate as a general route to new dehydro 2-azatryptophans and protected amino acid derivatives after catalytic hydrogenation. Georg Thieme Verlag Stuttgart.
Heck cross-couplingg reaction of 3-iodoindazoles with methyl acrylate: A mild and flexible strategy to design 2-azatryptamines
Collot, Valérie,Varlet, Didier,Rault, Sylvain
, p. 4363 - 4366 (2007/10/03)
In order to design 2-azabioisosteres of tryptamine, serotonin or melatonin, the conditions of the Heck coupling reaction of 3-iodoindazoles with methyl acrylate are studied. This reaction authorizes the synthesis of 3-indazolylpropenoates as key intermediates to prepare 3-indazolylpropionic acids and 3-indazolylethylamines. The flexible synthetic strategy allows molecular diversity. (C) 2000 Elsevier Science Ltd.