Optically active dihydrobenzopyran derivatives are synthesized by 6-endo cyclization of corresponding epoxy-phenol, which is readily derived from the enantioselective epoxidation of 1,3-diarylpropene. Synthetic dihydrobenzopyrans are converted into (-)-5,7-dideoxy-gallocatechin gallate as well as (-)-5,7-dideoxy-epigallocatechin derivative.
Concise synthesis of dideoxy-epigallocatechin gallate (DO-EGCG) and evaluation of its anti-influenza virus activity
作者:Takumi Furuta、Yasuo Hirooka、Ayako Abe、Yusuke Sugata、Mitsuru Ueda、Kouki Murakami、Takashi Suzuki、Kiyoshi Tanaka、Toshiyuki Kan
DOI:10.1016/j.bmcl.2007.03.041
日期:2007.6
Dideoxy-epigallocatechin gallate (DO-EGCG) (2), a simplified analog of naturally occurring EGCG (1), was efficiently prepared by directly introducing a ketone group at C3 and successive reduction to the sec-alcohol with 2,3-cis stereochemistry. Compound 2 showed potent anti-influenza virus activity, indicating that the hydroxyl substituents on the A-ring are not crucial for antiinfluenza virus activity. (C) 2007 Elsevier Ltd. All rights reserved.