The first construction of a 3,6-bridged ellagitannin skeleton with 1C4/B glucose core; synthesis of nonamethylcorilagin
作者:Yasunori Ikeda、Kohei Nagao、Koki Tanigakiuchi、Go Tokumaru、Hitoshi Tsuchiya、Hidetoshi Yamada
DOI:10.1016/j.tetlet.2003.11.006
日期:2004.1
The synthesis of nonamethylcorilagin is described. In the synthesis, the intramolecular Ullmann coupling afforded the (R)-hexahydroxydiphenoyl part-a characteristic bridge structure of the target molecule-when the glucopyranose ring was opened in advance. This synthesis demonstrates the first synthetic approach to a 3,6-bridged ellagitannin skeleton whose conformation of the D-glucose core is C-1(4) or skew boat. (C) 2003 Elsevier Ltd. All rights reserved.