Description
3-Prenyl-2,4,6-trihydroxybenzophenone isolated from the herbs of Garcinia cowa.
Synonyms
Phenyl[2,4,6-trihydroxy-3-(3-methyl-2-buten-1-yl)phenyl]methanone
Molecular Formula
C18H18O4
Preparation
Obtained by reaction of 2,4,6-tri--hydroxy-benzophenone with prenyl-di-n-hexylsulfonium tetrafluoroborate salt (1 equiv) in the presence of Hünig's base (1.1 equiv) in chloroform at r.t. for 7 h (42%).