More than five thousand naturally occurring flavonoids are known to exist. In this paper, we
review the synthesis and transformation of flavan, flavone, flavonol, proanthocyanidin …

Kettenbildung: Eine integrierte Strategie für den raschen Zusammenbau von Catechin‐
Oligomeren wurde entwickelt, womit ein Zugang zu höheren Oligomeren (6‐bis 24meren) …

Yb (OTf) 3-catalyzed equimolar condensation of the benzylated catechin with various 4-
alkoxy catechin derivatives was studied. In particular, the reaction using 4-(2 …

Total synthesis of prodelphinidin B3 and C2 have been accomplished. The key step is Lewis
acid-mediated equimolar condensations between a catechin and/or gallocatechin …

Total synthesis of prodelphinidin B1, B2, and B4 has been accomplished. The key step is
Lewis acid-mediated equimolar condensations between an epigallocatechin and/or a …

A catechin hetero-trimer isolated from Ziziphus jujuba has been synthesized. Among three
constituent monomers,(−)-epiafzelechin and (−)-epigallocatechin were prepared by de novo …

Interest in the synthesis of procyanidin (catechin or epicatechin) oligomers that contain the
4→ 8 interflavan linkage remains high, principally due to research into their health effects. A …

Oligomeric proanthocyanidins (OPAs) are components of a wide variety of plant-derived
materials and foodstuffs and their well-known biological activities, especially with respect to …

Since flavonoids exhibit a remarkable number of pharmacological properties like
antioxidant, anti-inflammatory, and antimicrobial activities, a great deal of work has been …

Stereoselective synthesis of catechin and epicatechin dimers incorporating a tert-
butyldimethylsilyl (TBS)-protecting group under intermolecular condensation is achieved …