61440-45-7Relevant academic research and scientific papers
Discovery of Salidroside-Derivated Glycoside Analogues as Novel Angiogenesis Agents to Treat Diabetic Hind Limb Ischemia
Han, Jingxuan,He, Yun,Huang, Song,Kasim, Vivi,Liu, Caiping,Marcelina, Olivia,Miyagishi, Makoto,Nugrahaningrum, Dyah Ari,Wang, Guixue,Wu, Shourong,Zou, Meijuan
supporting information, (2022/01/14)
Therapeutic angiogenesis is a potential therapeutic strategy for hind limb ischemia (HLI); however, currently, there are no small-molecule drugs capable of inducing it at the clinical level. Activating the hypoxia-inducible factor-1 (HIF-1) pathway in skeletal muscle induces the secretion of angiogenic factors and thus is an attractive therapeutic angiogenesis strategy. Using salidroside, a natural glycosidic compound as a lead, we performed a structure-activity relationship (SAR) study for developing a more effective and druggable angiogenesis agent. We found a novel glycoside scaffold compound (C-30) with better efficacy than salidroside in enhancing the accumulation of the HIF-1α protein and stimulating the paracrine functions of skeletal muscle cells. This in turn significantly increased the angiogenic potential of vascular endothelial and smooth muscle cells and, subsequently, induced the formation of mature, functional blood vessels in diabetic and nondiabetic HLI mice. Together, this study offers a novel, promising small-molecule-based therapeutic strategy for treating HLI.
Catalytic δ-hydroxyalkynone rearrangement in the stereoselective total synthesis of centrolobine, engelheptanoxides A and C and analogues
Ahmad, Mohammad N.,Chopra, Sidharth,Fernandes, Rodney A.,Kumar, Praveen
, (2021/08/13)
A catalytic stereoselective total synthesis of centrolobine and engelheptanoxides A and C has been completed via a metal-free catalytic δ-hydroxyalkynone rearrangement to 2,3-dihydro-4H-pyran-4-one and diastereoselective hydrogenation to the all syn-2,4,6-trisubstituted pyran strategy. The onliest required chirality was introduced by Jacobsen kinetic resolution, which further directed the diastereoselective hydrogenation. A first stereoselective synthesis of engelheptanoxide A is also accomplished. The analogues and derivatives of centrolobine and engelheptanoxides prepared were evaluated for antitubercular activity against M. tuberculosis H37Rv ATCC 27294.
Efficient Syntheses of Diverse, Medicinally Relevant Targets Planned by Computer and Executed in the Laboratory
Klucznik, Tomasz,Mikulak-Klucznik, Barbara,McCormack, Michael P.,Lima, Heather,Szymku?, Sara,Bhowmick, Manishabrata,Molga, Karol,Zhou, Yubai,Rickershauser, Lindsey,Gajewska, Ewa P.,Toutchkine, Alexei,Dittwald, Piotr,Startek, Micha? P.,Kirkovits, Gregory J.,Roszak, Rafa?,Adamski, Ariel,Sieredzińska, Bianka,Mrksich, Milan,Trice, Sarah L.J.,Grzybowski, Bartosz A.
supporting information, p. 522 - 532 (2018/03/21)
The Chematica program was used to autonomously design synthetic pathways to eight structurally diverse targets, including seven commercially valuable bioactive substances and one natural product. All of these computer-planned routes were successfully executed in the laboratory and offer significant yield improvements and cost savings over previous approaches, provide alternatives to patented routes, or produce targets that were not synthesized previously. Although computers have demonstrated the ability to challenge humans in various games of strategy, their use in the automated planning of organic syntheses remains unprecedented. As a result of the impact that such a tool could have on the synthetic community, the past half century has seen numerous attempts to create in silico chemical intelligence. However, there has not been a successful demonstration of a synthetic route designed by machine and then executed in the laboratory. Here, we describe an experiment where the software program Chematica designed syntheses leading to eight commercially valuable and/or medicinally relevant targets; in each case tested, Chematica significantly improved on previous approaches or identified efficient routes to targets for which previous synthetic attempts had failed. These results indicate that now and in the future, chemists can finally benefit from having an “in silico colleague” that constantly learns, never forgets, and will never retire. Multistep synthetic routes to eight structurally diverse and medicinally relevant targets were planned autonomously by the Chematica computer program, which combines expert chemical knowledge with network-search and artificial-intelligence algorithms. All of the proposed syntheses were successfully executed in the laboratory and offer substantial yield improvements and cost savings over previous approaches or provide the first documented route to a given target. These results provide the long-awaited validation of a computer program in practically relevant synthetic design.
Convergent total synthesis of (±) myricanol, a cyclic natural diarylheptanoid
Bochicchio,Schiavo,Chiummiento,Lupattelli,Funicello,Hanquet,Choppin,Colobert
, p. 8859 - 8869 (2018/11/30)
Myricanol 1, a constituent of Myrica species, has been reported to lower the levels of the microtubule-associated protein tau (MAPT), whose accumulation plays an important role in some neurodegenerative diseases, such as Alzheimer's disease (AD). Herein w
Combining spiro-fused cyclohexadienone – tetrahydrofuran ring system with glycine: Asymmetric synthesis of a new class of α-amino acid derivatives
Devi, Runjun,Das, Sajal Kumar
supporting information, p. 2281 - 2283 (2018/05/23)
Herein, we present the asymmetric synthesis of spiro-fused cyclohexadienone – tetrahydrofuran-embedded glycine derivatives as a new class of nonproteinogenic α-amino acid derivatives. Starting from commercially available 2-allylphenols, key β-hydroxy-α-am
Flexible Analogues of Azaindole DYRK1A Inhibitors Elicit Cytotoxicity in Glioblastoma Cells
Zhou, Qingqing,Reekie, Tristan A.,Abbassi, Ramzi H.,Venkata, Dinesh Indurthi,Font, Josep S.,Ryan, Renae M.,Rendina, Louis M.,Munoz, Lenka,Kassiou, Michael
, p. 789 - 797 (2018/09/11)
DYRK1A is a novel target for epidermal growth factor receptor (EGFR)-dependent glioblastoma and it represents a promising strategy for cancer therapy. DYRK1A inhibition has been found to promote EGFR degradation in glioblastoma cells by triggering endocyt
Lewis Acid Mediated "endo-dig" Hydroalkoxylation-Reduction on Internal Alkynols for the Stereoselective Synthesis of Cyclic Ethers and 1,4-Oxazepanes
Gharpure, Santosh J.,Vishwakarma, Dharmendra S.,Nanda, Santosh K.
supporting information, p. 6534 - 6537 (2017/12/26)
Lewis acid mediated 5/6/7-endo-dig hydroalkoxylation-reduction cascade on internal alkynols gave an expedient, stereoselective synthesis of cyclic ethers and 1,4-oxazepanes. The strategy has been extended to the first examples of hydroalkoxylation-alkyne
Lipase-catalyzed resolution of 1-[4-(benzyloxy)phenyl]hex-5-en-3-ol: Synthesis of (-)-centrolobine
Tadiparthi, Krishnaji,Raghavendra,Kamal, Ahmed
, p. 2321 - 2326 (2017/10/06)
A practical and efficient method for the preparation of homoallylic alcohol and its successful enzymatic resolution has been developed. This lipase-catalyzed resolution process has been optimized with respect to different lipases and solvents. Moreover, M
Synthesis of tetrahydropyranyl diarylheptanoids from Dioscorea villosa
Kantee, Kawalee,Rukachaisirikul, Vatcharin,Tadpetch, Kwanruthai
, p. 3505 - 3509 (2016/07/15)
Concise syntheses of four tetrahydropyranyl diarylheptanoids isolated from Dioscorea villosa have been described. The key features include Prins cyclization to construct the tetrahydropyran cores, Keck asymmetric allylation, and Mitsunobu inversion. Optimization of the Prins cyclization conditions in order to minimize racemization has been described. Our syntheses also confirmed the absolute stereochemistry of the natural products.
The first stereoselective total synthesis of naturally occurring, bioactive (3R,5R)-1-(4-hydroxyphenyl)-7-phenylheptane-3,5-diol and the synthesis of its enantiomer
Reddy, Parigi Raghavendar,Sudhakar, Chithaluri,Kumar, Jayprakash Narayan,Das, Biswanath
, p. 289 - 295 (2013/03/28)
The first stereoselective total synthesis of the naturally occurring anti-emetic diarylheptanoid (3R,5R)-1-(4-hydroxyphenyl)-7-phenylheptane-3,5-diol (1) was accomplished starting from 4-hydroxybenzaldehyde and involving a Sharpless kinetic resolution and
