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Browsing CIMO by Subject "(Thio)Pyrans"
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- Six-membered ring systems: with O and/or S atomsPublication . Santos, Clementina M.M.; Silva, ArturThe most important achievements on the synthesis of O- and S-6-membered heterocycles published in 2021 are reviewed. This personal overview is focused on the developments made on the synthesis of a large variety of natural compounds, specific reactions, and reagents for the preparation of natural and synthetic pyrans, chromenes and chromans, isochromenes and isochromans, pyranones, coumarins and isocoumarins, chromones and chromanones, xanthenes and xanthones, thiopyrans and analogues, dioxanes, trioxanes, tetraoxanes, dithiins, and also oxathianes.
- Six-membered ring systems: With O and/or S atomsPublication . Santos, Clementina M.M.; Silva, ArturThis chapter covers the most recent advances on the synthesis of O- and S-6-membered heterocycles reported during 2022. This personal overview is focused on the new achievements made in the synthesis of several natural compounds, specific reactions and reagents for the preparation of natural and synthetic pyrans, chromenes and chromans, isochromenes and isochromans, pyranones, coumarins and isocoumarins, chromones and chromanones, xanthenes and xanthones, thiopyrans and analogues, dioxanes, trioxanes, tetraoxanes, dithiins, and also oxathianes.
- Six-membered ring systems: with O and/or S atomsPublication . Santos, Clementina M.M.; Silva, ArturA large variety of publications involving O- and S-6-membered ring systems have appeared in 2018. The importance of these heterocyclic compounds is highlighted by the large number of publications on the total synthesis of natural oxygen derivatives and of other communications dedicated to natural and synthetic derivatives. Reviews on the ruthenium-catalyzed synthesis of various O-6-membered heterocycles (18SC1551), the enantioselective syntheses of 3,4-dihydropyran derivatives (18CR2080), and strategies for the synthesis of coumarins (18SC1534) have appeared. The synthesis of natural pyran-2-ones and pyran-4-ones starting from alkynes and promoted by gold complexes (18AGE4215) and cyclization strategies of substituted alkynyl acids and esters to afford pyran-2-one and isocoumarin derivatives (18SL1) have been detailed in minireviews. The synthesis of various O-6-membered derivatives was also achieved through ultrasound irradiation (18SC1235) and using 4-hydroxy-6-methylpyran-2-one as a building block in multicomponent reactions (18H(96)381).