294203-78-4Relevant articles and documents
Cationic zirconocene- or hafnocene-based Lewis acids in organic synthesis: Glycoside-flavonoid analogy
Ohmori, Ken,Hatakeyama, Keisuke,Ohrui, Hiroki,Suzuki, Keisuke
, p. 1365 - 1373 (2007/10/03)
Cationic metallocene species, generated from Cp2MCl2 and AgClO4 (M=Zr, Hf), were used for the glycosylation of catechin derivative 2, enabling a concise synthesis of a glycosyl flavonoid, astilbin (1). Further study revealed the efficiency of this Lewis acidic species for SN1-type activation of the C(4) position of catechin derivative 11, enabling selective substitution with various nucleophiles.