105024-93-9Relevant articles and documents
Improved procedures for the synthesis of (S)-2-[N-(N'-benzyl- prolyl)amino]benzophenone (BPB) and Ni(II) complexes of Schiff's bases derived from BPB and amino acids
Belokon', Yuri N.,Tararov, Vitali I.,Maleev, Viktor I.,Savel'eva, Tatiana F.,Ryzhov, Michael G.
, p. 4249 - 4252 (1998)
(S)-N-Benzylproline (BP) was obtained by the reaction of (S)-proline and benzylchloride in high chemical yield (89%). (S)-2-[N-(N'- Benzylprolyl)amino]benzophenone (BPB) was synthesized in amounts greater than 100 g by the SOCl2 promoted condensation of BP with 2-aminobenzophenone (yield 82%). Ni(II) complexes of Schiff's bases derived from BPB and amino acids were prepared by an improved procedure involving the use of KOH as a base and MeOH as solvent (yield 90-91%).
Self-Masked Aldehyde Inhibitors: A Novel Strategy for Inhibiting Cysteine Proteases
Li, Linfeng,Chenna, Bala C.,Yang, Kai S.,Cole, Taylor R.,Goodall, Zachary T.,Giardini, Miriam,Moghadamchargari, Zahra,Hernandez, Elizabeth A.,Gomez, Jana,Calvet, Claudia M.,Bernatchez, Jean A.,Mellott, Drake M.,Zhu, Jiyun,Rademacher, Andrew,Thomas, Diane,Blankenship, Lauren R.,Drelich, Aleksandra,Laganowsky, Arthur,Tseng, Chien-Te K.,Liu, Wenshe R.,Wand, A. Joshua,Cruz-Reyes, Jorge,Siqueira-Neto, Jair L.,Meek, Thomas D.
, p. 11267 - 11287 (2021)
Cysteine proteases comprise an important class of drug targets, especially for infectious diseases such as Chagas disease (cruzain) and COVID-19 (3CL protease, cathepsin L). Peptide aldehydes have proven to be potent inhibitors for all of these proteases. However, the intrinsic, high electrophilicity of the aldehyde group is associated with safety concerns and metabolic instability, limiting the use of aldehyde inhibitors as drugs. We have developed a novel class of self-masked aldehyde inhibitors (SMAIs) for cruzain, the major cysteine protease of the causative agent of Chagas disease - Trypanosoma cruzi. These SMAIs exerted potent, reversible inhibition of cruzain (Ki? = 18-350 nM) while apparently protecting the free aldehyde in cell-based assays. We synthesized prodrugs of the SMAIs that could potentially improve their pharmacokinetic properties. We also elucidated the kinetic and chemical mechanism of SMAIs and applied this strategy to the design of anti-SARS-CoV-2 inhibitors.
Enantioselective synthesis of 2-substitued-tetrahydroisoquinolin-1-yl glycine derivatives via oxidative cross-dehydrogenative coupling of tertiary amines and chiral nickel(II) glycinate
Zhou, Shengbin,Wang, Jiang,Lin, Daizong,Zhao, Fei,Liu, Hong
, p. 11204 - 11212 (2013)
The asymmetric synthesis of 2-substituted-tetrahydroisoquinolin-1-yl glycines was achieved by an oxidative cross-dehydrogenative coupling (CDC) reaction. This method for activation of the α-C-H bonds of amines with chiral nickel(II) glycinate using o-chlo
The formation of pyrroline and tetrahydropyridine rings in amino acids catalyzed by pyrrolysine synthase (PylD)
Quitterer, Felix,Beck, Philipp,Bacher, Adelbert,Groll, Michael
, p. 8150 - 8153 (2014)
The dehydrogenase PylD catalyzes the ultimate step of the pyrrolysine pathway by converting the isopeptide L-lysine-Nε-3R-methyl-D-ornithine to the 22nd proteinogenic amino acid. In this study, we demonstrate how PylD can be harnessed to oxidize various isopeptides to novel amino acids by combining chemical synthesis with enzyme kinetics and X-ray crystallography. The data enable a detailed description of the PylD reaction trajectory for the biosynthesis of pyrroline and tetrahydropyridine rings as constituents of pyrrolysine analogues.
ASYMMETRIC SYNTHESIS OF ASPARTIC AND α-METHYLASPARTIC ACIDS VIA Ni(II) COMPLEXES WITH SCHIFF BASES OF GLYCINE AND ALANINE AND CHIRAL CARBONYL-CONTAINING REAGENTS
Belokon, Yu. N.,Tararov, V. I.,Maleev, V. I.,Motsishkite, S. M.,Vitt, S. V.,et al.
, p. 1361 - 1365 (1991)
We propose a method for the synthesis of aspartic and α-methylaspartic acids by alkylation with ethyl bromoacetate of the α-carbon atom of the amino acid moiety in Ni(II) complexes of Schiff bases of glycine with (S)-2-benzophenone and alanine with (S)-2-benzaldehyde, respectively.Attempts to synthesize α-methylaspartic acid by oxidative cleavage of the C=C bond to a COOH group in the complex of the Schiff base of α-allylalanine with (S)-2-benzophenone were unsuccessful.
Synthesis of (2S,3S)-β-(trifluoromethyl)-α,β-diamino acid by Mannich addition of glycine Schiff base Ni(II) complexes to N-tert-butylsulfinyl-3,3,3-trifluoroacetaldimine
Kawamura, Akie,Moriwaki, Hiroki,R?schenthaler, Gerd-Volker,Kawada, Kosuke,Ace?a, José Luis,Soloshonok, Vadim A.
, p. 67 - 72 (2015)
A convenient access to (2S,3S)-β-(trifluoromethyl)-α,β-diamino acid is reported by using highly diastereoselective Mannich addition reactions of either chiral or achiral Ni(II) complexes derived from glycine Schiff bases to a chiral sulfinimine, N-tert-butylsulfinyl-3,3,3-trifluoroacetaldimine. Disassembly of the resultant Ni(II) complexes affords the target amino acid which was, for the first time, isolated in enantiomerically pure form and fully characterized.
Rational Design and Synthesis of Modified Teixobactin Analogues: In Vitro Antibacterial Activity against Staphylococcus aureus, Propionibacterium acnes and Pseudomonas aeruginosa
Ng, Vivian,Kuehne, Sarah A.,Chan, Weng C.
, p. 9136 - 9147 (2018)
Teixobactin, a recently discovered depsipeptide that binds to bacterial lipid II and lipid III, provides a promising molecular scaffold for the design of new antimicrobials. Herein, we describe the synthesis and antimicrobial evaluation of systematically modified teixobactin analogues. The replacement of the Ile11 residue with aliphatic isosteres, the modification of the guanidino group at residue 10 and the introduction of a rigidifying residue, that is, dehydroamino acid, into the macrocyclic ring generated useful structure–activity information. Extensive antimicrobial susceptibility assessment against a panel of clinically relevant Staphylococcus aureus and Propionibacterium acnes strains led to the identification of the new lead compound, [Arg(Me)10,Nle11]teixobactin, with an excellent bactericidal activity (minimum inhibitory concentration (MIC)=2–4 μg mL?1). Significantly, the antimicrobial activity of several of the teixobactin analogues against the pathogenic Gram-negative Pseudomonas aeruginosa was “restored” when combined with the sub-MIC concentration of the outer membrane-disruptive antibiotic colistin. The antimicrobial effectiveness of a [Tfn10,Nle11]teixobactin (32 μg mL?1)–colistin (2 μg mL?1; 0.5×MIC) combination against P. aeruginosa PAO1 reveals, for the first time, an alternative therapeutic option in the treatment of Gram-negative infections.
Asymmetric Synthesis of (2S,3S)-α-(1-Oxoisoindolin-3-yl)glycines under Low-Basicity "kinetic" Control
Li, Tingting,Zhou, Shengbin,Wang, Jiang,Ace?a, José Luis,Soloshonok, Vadim A.,Liu, Hong
, p. 11275 - 11280 (2015)
The previously illusive (2S,3S)-configured α-(1-oxoisoindolin-3-yl)glycines can be prepared under mild DBU-catalyzed, low-basicity conditions. The overall process includes a cascade of aldol addition, cyclization, rearrangement, and conjugate addition reactions, leading to the target products with moderate to good chemical yields and diastereoselectivity.
Asymmetric synthesis of novel highly sterically constrained (2S,3S)-3- methyl-3-trifluoromethyl- and (2S,3S,4R)-3-trifluoromethyl-4- methylpyroglutamic acids
Soloshonok, Vadim A.,Cai, Chaozhong,Hruby, Victor J.,Van Meervelt, Luc
, p. 12045 - 12058 (1999)
Asymmetric synthesis of the novel highly sterically constrained (2S,3S)- 3-methyl-3-trifluoromethyl-and (2S,3S,4R)-3-trifluoromethyl-4- methylpyroglutamic acids has been developed via diastereoselective Michael addition reactions between a Ni(II) complex of the chiral non-racemic Schiff base of glycine with (S)-o-[N-(N-benzylprolyl)amino]benzophenone (BPB) and the corresponding trifluoromethyl-containing crotonates. Of particular synthetic interest is the reaction of the glycine Ni-complex with ethyl 3- trifluoromethyl crotonate featuring excellent diastereoselectivity (>98% de) as a result of complete stereochemical discrimination between the methyl and trifluoromethyl groups. A mechanistic rationale for the observed kinetically controlled stereochemical outcome is discussed.
Asymmetric synthesis of (1R,2S)-1-amino-2-vinylcyclopropanecarboxylic acid by sequential SN2-SN2′ dialkylation of (R)-N-(benzyl)proline-derived glycine Schiff base Ni(ii) complex
Kawashima, Aki,Xie, Chen,Mei, Haibo,Takeda, Ryosuke,Kawamura, Akie,Sato, Tatsunori,Moriwaki, Hiroki,Izawa, Kunisuke,Han, Jianlin,Acea, Jos Luis,Soloshonok, Vadim A.
, p. 1051 - 1058 (2015)
This work describes a new process for the asymmetric synthesis of (1R,2S)-1-amino-2-vinylcyclopropanecarboxylic acid of high pharmaceutical importance. The sequence of the reactions includes PTC alkylation (SN2), homogeneous SN2′ cyclization followed by disassembly of the resultant Ni(ii) complex. All reactions are conducted under operationally convenient conditions and suitably scaled up to 6 g of the starting Ni(ii) complex. This journal is
