Synthetic Strategies Towards Safer NSAIDs Through Prodrug Approach: A Review

Non-steroidal anti-inflammatory drugs (NSAIDs) are agents that are used for various properties such as analgesic activity, anti-inflammatory activity, antipyretic activity, etc. But this class of drugs is associated with different side effects such as dyspepsia, gastroduodenal ulcers, gastrointestinal (GI) bleeding and perforation. The prodrug approach is quite beneficial to curb these side effects. Prodrugs are the inactive compounds that, on metabolism get converted into an active metabolite exhibiting desired activities. Commonly used approaches for synthesizing prodrugs are amide, esters, and mutual prodrugs by suppressing the free carboxylic groups responsible for these side effects. In this review, different schemes reported for the synthesis of NSAIDs that are devoid of undesired side effects such as irritation to gastric mucosa, gastrotoxicity, and ulcerogenicity have been compiled. Docking studies and the structure-activity relationship of some compounds are also discussed. The paper shall help the researchers to understand the methods to expedite the synthesis by carrying out substitutions of various groups of the parent compound and establish the mechanism of action of these derivatives of masking the unwanted side effects.

Phytophenols as Promoieties for Prodrug Design

One lucrative method for overcoming challenges in drug discovery or for enhancing undesirable properties of already-approved medications is prodrug design. The goal of this review is to present researchers with a profile of naturally occurring Phytophenols as carriers that would be used for prodrug synthesis as well as their advantages. Phytophenols offer several advantages when used as promoieties as they also possess antioxidant and analgesic properties, they are obtained naturally and their safety profile is well established. Several phytophenols like menthol, thymol, eugenol, guaiacol, sesamol, vanillin, and umbelliferone are some of the phytophenols that have several beneficial properties and are extensively employed in the field of food processing and medicine. In the current review, we have listed all types of promoieties that are used for prodrug synthesis and phytophenols are reviewed in detail, which may help researchers to select phytophenols based on their need and suitability for drug candidates.

Pyrazoles as Anti-inflammatory and Analgesic Agents: In-vivo and In-silico Studies

BACKGROUND

Pyrazole is a well-known nucleus in the pharmacy field with a wide range of other activities in addition to anti-inflammatory and analgesic, i.e., anticonvulsant, antiviral, and anticancer activities. There are well-known marketed drugs having pyrazole moiety as celecoxib, and lonazolac as COX-II inhibitors.

AIMS

We aim to synthesize better anti-inflammatory than existing ones. Thiophene is also known for its analgesic and anti-inflammatory action. Thus, the fusion of both gives better anti-inflammatory agents. In the present studies, derivatives from two series of pyrazole were prepared by reacting substituted chalcone (3a-3f) derivatives prepared from 2-acetyl thiophene. They substituted aromatic aldehydes with phenyl hydrazine to form (5a-5f) and with 2, 4-dinitro phenyl hydrazine giving compounds (6a-6f) separately.

METHODS

Purified and characterized pyrazoles have been analyzed for in-vivo analgesic and anti-inflammatory activities by using standard methods. Compounds 5e, 5f, and 6d were proved to be potent analgesics and series (5a-5f) was found to have anti-inflammatory action, which was further validated using docking and ADME studies.

RESULTS

The ADME profile of synthesized compounds was found to be satisfactory.

CONCLUSION

The synthesized compounds can serve as lead for further drug designing.

Phytochemistry and Pharmacological Activity of Malva sylvestris L: A Detailed Insight

Malva sylvestris L., is commonly referred to as Mallow and is found in Europe, Asia and Africa. This has been traditionally used for inflammation, gastrointestinal disturbances, skin disorders, menstrual pains, and urological disorders. This review covers phytoconstituents and Pharmacological activities of M. sylvestris. The plant contains a large number of phytochemical constituents having diverse pharmacological activities. The plant contains many phenolic compounds responsible for its strong antioxidant activity. Coumarins from Mallow have a potential anticancer activity. Malva sylvestris also contains essential as well as non-essential elements and minerals. Many researchers have provided evidence that Malva sylvestris is a good candidate for use as a medicinal herb and has good nutritional value. The leaves, in particular, offer properties like anticancer, skin whitening, and anti-aging. Furthermore, the aqueous extract was recently shown to have an anti-ulcerogenic effect. Malva sylvestris has a high potential for use in cosmetics such as skin whitening and anti-aging treatments. Methanolic extracts of Malva sylvestris leaves, and flowers showed strong antibacterial activity against a common plant pathogen bacterium. The plant also contains Malvone A, which is responsible for antibacterial action. The plant also possesses anti-inflammatory, analgesic, wound healing properties and various other activities.