Regioselective synthesis of methylated epigallocatechin gallate via nitrobenzenesulfonyl (Ns) protecting group
作者:Yoshiyuki Aihara、Atsusi Yoshida、Takumi Furuta、Toshiyuki Wakimoto、Toshifumi Akizawa、Motomi Konishi、Toshiyuki Kan
DOI:10.1016/j.bmcl.2009.05.111
日期:2009.8
Regioselective synthesis of methylated epigallocatechin gallate from epigallocatechin was accomplished using a 2-nitrobenzenesulfonyl (Ns) group as a protecting group for phenols. This methodology provided several methylated catechins, which are naturally scarce catechin derivatives. (C) 2009 Elsevier Ltd. All rights reserved.
[EN] PROCESS FOR EFFICIENTLY PRODUCING ALKYLATED CATECHIN<br/>[FR] PROCÉDÉ POUR LA FABRICATION EFFICACE DE CATÉCHINE ALKYLÉE
An efficient and versatile synthetic method for labile polyphenols was established using 2-nitrobenzenesulfonate (Ns) as a protectinggroup for phenol. This methodology provides regio- and stereoselective access to a range of methylated catechins, such as methylated epigallocatechin gallates, that are not readily available from natural sources. In addition, biomimetic synthesis of theaflavins from