Structure of cleomeolide, a novel diterpene lactone from Cleome icosandra Linn

Theoretical evaluation of Cleome species' bioactive compounds and therapeutic potential: A literature review

The species of Cleome genus are taxonomically included in the family of Cleomaceae and in the order of Brassicales, representing flowering plants with a long history of use in traditional medicine. Phytochemical screening experiments revealed that Cleome species contain a wide range of beneficial bioactive compounds, including alkaloids, essential oils, fatty acids, flavonoids, terpenes, sterols, and anthocyanins, indicating a therapeutic potential. Furthermore, due to the presence of these phytocompounds, there are various plant species in this genus that have demonstrated a wide range of genotypic, chemo typic, and biological activity in several ecological settings around the world. The potential biological actions and pharmacological effects, such as analgesic, anti-inflammatory, antipyretic, anti-diabetic, antidepressant, antibacterial, anti-arthritic, anticancer, and hepatoprotective are closely related to the active substances contained in various parts of the plants. By centralizing medical data provided by the scientific literature, we offer in the present work a comprehensive perspective on a wide range of bioactive compounds identified from diverse Cleome species, emphasizing the correlation of natural active substances with potential pharmacological activities that can contribute to the improvement of therapeutic management for a range of pathologies. In addition, this review suggests future research perspectives to improve the use of phytochemicals contained in the species of Cleome genus, both in terms of increasing therapeutic efficacy and safety profiles, but also in terms of identifying a possible new pharmacological effect.

Phytochemistry and polypharmacology of cleome species: A comprehensive Ethnopharmacological review of the medicinal plants

ETHNOPHARMACOLOGICAL RELEVANCE

Cleome species in particular (C. gynandra Linn, C. viscosa Linn, C. rutidosperma DC, C. felina Linn.), commonly known as spider flowers, belong to the genus of flowering plants in Cleomaceae family. Found primarily in the African countries (Kenya, Tanzania, Egypt, South Africa, and Nigeria), Asian countries (India and Afghanistan), European countries (Italy), and also in other countries like Brazil and Austria. These plants are commonly cultivated as a vegetable crop for their nutritional benefits, and the leaves are widely consumed for their health-promoting effects. The different parts of the plants, such as leaves, seeds, flowers, and roots, are used to treat acute and chronic inflammatory disorders, hepatotoxicity, malaria, fungal diseases, and cancer.

AIM OF THE STUDY

Detailed investigations in underlining the molecular mechanisms and their wide variety of effects in treating various diseases remain ambiguous. The review focuses on an in-depth discussion of studies targeting phytochemistry and polypharmacology. Thus, the review aims to recapitulate the therapeutic potential of the components of Cleome involved in the treatment of a wide variety of ailments from ancient times were collected and presented along with strategies aiming for future studies.

MATERIALS AND METHODS

The information provided is collected from several scientific databases (PubMed, Elsevier, ScienceDirect) and traditional medicine books, and other professional websites.

RESULTS AND CONCLUSION

Investigations and current evidence revealed that the different chemical constituents present in cleome species possess various health-promoting effects along with the aerial parts showing promising traditional uses in traditional healing and culinary. An explorative survey in the current review highlights the traditional healing effects along with a broad scope of studies that can be performed in the future.

The phomactins. A novel group of terpenoid platelet activating factor antagonists related biogenetically to the taxanes

A description of the structurally unusual "phomactin" family of platelet activating factor antagonists recently found in the marine fungus Phoma sp. is presented. The phomactins show an interesting structural and biosynthetic relationship with the more familiar taxane group of antitumor compounds isolated from yew trees. The Account highlights and discusses this unique relationship and also presents a cogent picture of plausible biogenetic interrelationships within the family of phomactins. Complementary synthetic endeavors with the phomactins are interwoven in the discussions, alongside contemporaneous biosynthetic studies with both the phomactins and the taxanes.

Proposed mechanism for diterpene synthases in the formation of phomactatriene and taxadiene

To obtain insight into how the cyclization pathway is controlled, the mechanism of diterpene synthase reactions (the putative phomactatriene synthase and taxadiene synthases) involving the same intermediate was investigated in detail. The mechanism of the initial transformation of GGDP to verticillen-12-yl cation (A+) was proposed based on the labelling pattern of phomactatriene (9a) obtained in the feeding experiments with 13C-labelled acetates. To obtain information on the reaction pathway of A+ to 9a and taxadiene, reactions of verticillol with various acids were conducted. Structural determination of products allowed us to propose a reaction pathway via cations A+, D+, E+, F+ and G+. Identification of hydrocarbons in mycelial extracts of phomactin-producing fungus supported the proposed reaction mechanism. Based on the results of ab initio calculations for highly flexible cation intermediates, a mechanism is proposed.

New cembranes from Cleome spinosa

Examination of the aerial portions of Cleome spinosa yielded five new cembranes, named cleospinols A (1), B (3), C (4), and D (5), and the 3'-hydroxy-iso-pentan-10-oate ester of cleospinol A (2). The cleospinols were determined to be derivatives of 10,13-dihydroxy-4,12-dimethyl-1-(1-methylethenyl)-11(E)-cyclotetradecene on the basis of spectroscopic data interpretation.

Utilization of the Phenylthio Substituent as a Multipurpose Synthetic Tool. Direct Application to the Enantioselective Construction of (-)-Salsolene Oxide

The architecturally unprecedented sesquiterpene (-)-salsolene oxide (1) has been synthesized in enantioselective fashion from (R)-(-)-carvone. Generation of the phenylthio-substituted vinyl ketene 4 is followed by intramolecular cyclization to the functionalized cyclobutanone 9. Vinyllithium addition to this intermediate proceeds in that stereocontrolled fashion which enables oxy-Cope rearrangement to operate readily under conditions of kinetic control. After hydride reduction, the desulfurization of 16 proceeds with inversion of bridgehead olefin geometry to deliver 17. This access route to the thermodynamically more stable geometric arrangement permits direct entry to 1. Attention is called specifically to the critical 3-fold function played by a phenylthio group introduced at the outset.