Abstract: 4H-Pyran is a well-known moiety, which appears in various natural and synthetic products. These compounds include various biological activities like anti-hepatotoxic, antitumor, anti-inflammatory, antioxidant, anti-spasmolytic, diuretic, estrogenic, anticoagulant, antifungal, antiviral, anti-helminthic, antimicrobial, hypothermal, anti-tubercular, anti-HIV, herbicidal, anticonvulsant and analgesic activity. This review has summarized an overview of general strategies that allow the design of 4H-pyran derivatives via catalyzed one-pot multicomponent reactions.
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