5680-83-1Relevant academic research and scientific papers
An efficient, stereocontrolled and versatile synthetic route to bicyclic partially saturated privileged scaffolds
Bond, Andrew D.,Hanby, Abigail R.,King, Thomas A.,Moss, Thomas A.,Sore, Hannah F.,Spring, David R.,Stewart, Hannah L.
supporting information, p. 6818 - 6821 (2020/07/04)
Herein, we describe the development of a simple, high yielding and stereocontrolled strategy for the synthesis of a series of triazolopiperazines and other biologically relevant fused scaffolds from optically active amino acids. This route was applied to the synthesis of 22 scaffolds containing new, previously inaccessible vectors and used to access a novel analogue of ganaplacide.
Consecutive hydrazino-Ugi-azide reactions: Synthesis of acylhydrazines bearing 1,5-disubstituted tetrazoles
De Fátima Barreto, Angélica S.,Dos Santos, Veronica Alves,Zandrade, Carlos Kleber
, p. 2596 - 2602 (2018/01/17)
Isocyanide-based multicomponent reactions (IMCRs) allow the construction of relatively complex molecules through a one-pot synthesis. The combination of IMCRs in a consecutive or sequential fashion further extends the complexity of the molecules obtained. Herein, we report the efficient application of this approach to the synthesis of acylhydrazines bearing 1,5-disubstituted tetrazoles. Our strategy was accomplished in only three steps: first, a one-pot hydrazino-Ugi-azide four-component reaction; second a hydrazinolysis and finally an additional hydrazino-Ugi-azide reaction. This sequence provides the title compounds in moderate to excellent yields. The products synthesized herein contain functional groups within their structures that can be easily modified to obtain new acylhydrazino 1,5-disubstituted tetrazoles.
Synthesis of acylhydrazino-peptomers, a new class of peptidomimetics, by consecutive Ugi and hydrazino-Ugi reactions
Barreto, Angélica De Fátima S.,Dos Santos, Veronica Alves,Andrade, Carlos Kleber Z.
supporting information, p. 2865 - 2872 (2017/01/09)
Herein we describe a versatile approach for the synthesis of acylhydrazino-peptomers, a new class of peptidomimetics. The key idea in this approach is based on a simple route using a one-pot hydrazino-Ugi four-component reaction followed by a hydrazinolysis or hydrolysis reaction and subsequent hydrazino-Ugi reaction or classical Ugi reaction for the construction of acyclic acylhydrazino-peptomers. The consecutive multicomponent reactions produced a variety of acylhydrazino-peptomers in moderate to excellent yields (47-90%). These compounds are multifunctional intermediates that can be further functionalized to obtain new peptidomimetics with potential biological activity.
Oxadiazole-Based Cell Permeable Macrocyclic Transition State Inhibitors of Norovirus 3CL Protease
Damalanka, Vishnu C.,Kim, Yunjeong,Alliston, Kevin R.,Weerawarna, Pathum M.,Galasiti Kankanamalage, Anushka C.,Lushington, Gerald H.,Mehzabeen, Nurjahan,Battaile, Kevin P.,Lovell, Scott,Chang, Kyeong-Ok,Groutas, William C.
, p. 1899 - 1913 (2016/03/22)
Human noroviruses are the primary causative agents of acute gastroenteritis and a pressing public health burden worldwide. There are currently no vaccines or small molecule therapeutics available for the treatment or prophylaxis of norovirus infections. Norovirus 3CL protease plays a vital role in viral replication by generating structural and nonstructural proteins via the cleavage of the viral polyprotein. Thus, molecules that inhibit the viral protease may have potential therapeutic value. We describe herein the structure-based design, synthesis, and in vitro and cell-based evaluation of the first class of oxadiazole-based, permeable macrocyclic inhibitors of norovirus 3CL protease.
Benzotriazole-mediated synthesis of aza-peptides: En route to an aza-leuenkephalin analogue
Abo-Dya, Nader E.,Biswas, Suvendu,Basak, Akash,Avan, Ilker,Alamry, Khalid A.,Katritzky, Alan R.
, p. 3541 - 3552 (2013/05/23)
Novel N-(N-Pg-azadipeptidoyl)benzotriazoles 20a-e couple efficiently with α-amino acids 21a-e, dipeptides 22a-c, aminoxyacetic acid 23a, depsidipeptide 23b, and α-hydroxy-β-phenylpropionic acid 27 yielding, respectively, azatripeptides 24a-g, azatetrapeptides 25a,b, a hybrid azatripeptide with an oxyamide bond 26a, a hybrid azatetrapeptide with an ester bond 26b, and a hybrid azatripeptide with an ester bond 28. A new protocol for the synthesis of N-Pg-azatripeptides 33a,b and 35a,b, each containing a natural amino acid at the N-terminus, avoids the low coupling rates of the aza-amino acid residue and enables the solution-phase synthesis of an azaphenylalanine analogue of Leu-enkephalin 40.
Induction of chirality: Experimental evidence of atropisomerism in azapeptides
Ottersbach, Philipp A.,Schnakenburg, Gregor,Guetschow, Michael
supporting information; experimental part, p. 5772 - 5774 (2012/08/28)
Methylation of the peptide bond in model azadipeptides leads to the E configuration and hence to atropisomerism due to a restricted rotation around the N-N axis. This journal is
COMPOUNDS FOR TREATING DISORDERS MEDIATED BY METABOTROPIC GLUTAMATE RECEPTOR 5, AND METHODS OF USE THEREOF
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Page/Page column 185-186, (2010/11/03)
Provided herein are compounds and methods of synthesis thereof. The compounds provided herein are useful for the treatment, prevention, and/or management of various disorders, such as neurological disorders, psychiatric disorders, neuromuscular disorders, gastrointestinal disorders, lower urinary tract disorder, and cancer. Compounds provided herein modulate the activity of metabotropic glutamate receptor 5 (mGluR5) in the central nervous system or the periphery. Pharmaceutical formulations containing the compounds and their methods of use are also provided herein.
New system for peptide synthesis using N-acylpyrazoles
Kashima, Choji,Tsuruoka, Shiro,Mizuhara, Saori
, p. 413 - 424 (2007/10/03)
New system of peptide synthesis was described. The extension of one amino acid unit on the peptide chain was constituted from only 2 reaction steps, the conversion from esters to the corresponding N-acylpyrazoles and the subsequent aminolysis with amino esters. This new system was distinctive from the conventional peptide synthesis, which was consisted of 3 steps of the deprotection, the activation and the condensation. Moreover, the key intermediate N-acylpyrazoles exhibited the excellent properties of high sensitivity and separability for the chiral column on HPLC using the UV detector.
Inverse Electron Demand Diels-Alder Reactions of Indole IV. A New Route to β-Carbolines
Fan, Wen-Hong,Parikh, Mamta,Snyder, John K.
, p. 6591 - 6594 (2007/10/02)
β-Carbolines have been prepared by the intramolecular cycloaddition of indole with 1,2,4-triazines tethered from C3 with the indolyl nitrogen using a thiourea linkage.Subsequent to the cycloaddition, reductive cleavage of the thiourea subunit provides the β-carboline.
