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Kongkiat Trisuwan Vatcharin Rukachaisirikul Kawitsara Borwornwiriyapan Souwalak Phongpaichit Jariya Sakayaroj 《Tetrahedron letters》2014
Two new benzopyranones, named coniochaetones E (1) and F (2), one new xanthone, penicillone C (3), and one new benzophenone, penicillanone (4), are isolated from the soil fungus Penicillium citrinum PSU-RSPG95, together with ten known compounds. Their structures are identified on the basis of spectroscopic data. The isolated compounds are evaluated for their cytotoxic activity. 相似文献
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The regioselective cyclization/dehydration sequence of ortho diketo phenoxyethers induced by DBU has been explored. The results demonstrated a high degree of selectivity with preference for 6-exo-trig cyclization leading to the formation of γ-benzopyranone derivatives in good yield. 相似文献
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Prattya Nealmongkol Kassrin Tangdenpaisal Somkid Sitthimonchai Somsak Ruchirawat Nopporn Thasana 《Tetrahedron》2013
Benzopyranones were successfully synthesized using Cu(I)-mediated C–O bond formation in subcritical water. A number of benzopyranone derivatives including polymethoxy benzopyranones, benzopyranopyridones, chromenoindolones, and furochromenones were synthesized in satisfactory yield. This methodology was further applied to synthesize the intestinal microbial metabolites, urolithins A, B, and C, which were found to exhibit potent antioxidant activity. 相似文献
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