scholarly journals Combining enyne metathesis with long-established organic transformations: a powerful strategy for the sustainable synthesis of bioactive molecules

2020 ◽  
Vol 16 ◽  
pp. 738-755
Author(s):  
Valerian Dragutan ◽  
Ileana Dragutan ◽  
Albert Demonceau ◽  
Lionel Delaude

This account surveys the current progress on the application of intra- and intermolecular enyne metathesis as main key steps in the synthesis of challenging structural motifs and stereochemistries found in bioactive compounds. Special emphasis is placed on ruthenium catalysts as promoters of enyne metathesis to build the desired 1,3-dienic units. The advantageous association of this approach with name reactions like Grignard, Wittig, Diels–Alder, Suzuki–Miyaura, Heck cross-coupling, etc. is illustrated. Examples unveil the generality of such tandem reactions in providing not only the intricate structures of known, in vivo effective substances but also for designing chemically modified analogs as valid alternatives for further therapeutic agents.

2020 ◽  
Vol 21 (20) ◽  
pp. 7688 ◽  
Author(s):  
Ancuta Jurj ◽  
Cecilia Pop-Bica ◽  
Ondrej Slaby ◽  
Cristina D. Ştefan ◽  
William C. Cho ◽  
...  

Communications among cells can be achieved either via direct interactions or via secretion of soluble factors. The emergence of extracellular vesicles (EVs) as entities that play key roles in cell-to-cell communication offer opportunities in exploring their features for use in therapeutics; i.e., management and treatment of various pathologies, such as those used for cancer. The potential use of EVs as therapeutic agents is attributed not only for their cell membrane-bound components, but also for their cargos, mostly bioactive molecules, wherein the former regulate interactions with a recipient cell while the latter trigger cellular functions/molecular mechanisms of a recipient cell. In this article, we highlight the involvement of EVs in hallmarks of a cancer cell, particularly focusing on those molecular processes that are influenced by EV cargos. Moreover, we explored the roles of RNA species and proteins carried by EVs in eliciting drug resistance phenotypes. Interestingly, engineered EVs have been investigated and proposed as therapeutic agents in various in vivo and in vitro studies, as well as in several clinical trials.


2012 ◽  
Vol 2012 (9) ◽  
pp. 1843-1850 ◽  
Author(s):  
Sambasivarao Kotha ◽  
Deepti Goyal née Bansal ◽  
Niranjan Thota ◽  
Venu Srinivas

2018 ◽  
Vol 14 ◽  
pp. 2468-2481 ◽  
Author(s):  
Sambasivarao Kotha ◽  
Milind Meshram ◽  
Chandravathi Chakkapalli

This account provides an overview of recent work, including our own contribution dealing with Suzuki–Miyaura cross coupling in combination with metathesis (or vice-versa). Several cyclophanes, polycycles, macrocycles, spirocycles, stilbenes, biaryls, and heterocycles have been synthesized by employing a combination of Suzuki cross-coupling and metathesis. Various popular reactions such as Diels–Alder reaction, Claisen rearrangement, cross-metathesis, and cross-enyne metathesis are used. The synergistic combination of these powerful reactions is found to be useful for the construction of complex targets and fulfill synthetic brevity.


ACS Omega ◽  
2019 ◽  
Vol 4 (27) ◽  
pp. 22261-22273 ◽  
Author(s):  
Sambasivarao Kotha ◽  
Arjun S. Chavan ◽  
Deepti Goyal

ChemInform ◽  
2012 ◽  
Vol 43 (33) ◽  
pp. no-no
Author(s):  
Sambasivarao Kotha ◽  
Deepti Goyal ◽  
Niranjan Thota ◽  
Venu Srinivas

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