Kessberg, Anton published the artcileEnantioselective Synthesis of 2′- and 3′-Substituted Natural Flavans by Domino Asymmetric Transfer Hydrogenation/Deoxygenation, Recommanded Product: 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, the publication is Organic Letters (2016), 18(24), 6500-6503, database is CAplus and MEDLINE.
A concise and highly enantioselective synthesis of the natural flavans kazinol U and (2S)-7,3′-dihydroxy-4′-methoxyflavan is reported for the first time. The key transformation is a single-step conversion of a racemic flavanone to a flavan by means of an asym. transfer hydrogenation/deoxygenation cascade with kinetic resolution
Organic Letters published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C16H14O6, Recommanded Product: 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one.
Referemce:
https://en.wikipedia.org/wiki/Tetrahydropyran,
Tetrahydropyran – an overview | ScienceDirect Topics