Synthesis of the allelochemical alliarinoside present in garlic mustard (Alliaria petiolata), an invasive plant species in North America
作者:Carl Erik Olsen、Birger Lindberg Møller、Mohammed Saddik Motawia
DOI:10.1016/j.carres.2014.05.006
日期:2014.7
The allelochemical alliarinoside present in garlic mustard (Alliaria petiolata), an invasive plant species in North America, was chemically synthesized using an efficient and practical synthetic strategy based on a simple reaction sequence. Commercially available 1,2,3,4,6-penta-O-acetyl-beta-D-glucopyranose was converted into prop-2-enyl 2',3',4',6'-tetra-O-acetyl-beta-D-glucopyranoside and subjected to epoxidation. In a one-pot reaction, ring-opening of the epoxide using TMSCN under solvent free conditions followed by treatment of the formed trimethylsilyloxy nitrile with pyridine and phosphoryl chloride, afforded the acetylated beta-unsaturated nitriles (Z)-4-(2',3',4',6'-tetra-O-beta-D-glucopyranosyloxy)but-2-enenitrile and its isomer (E)-4-(2',3',4',6'-tetra-O-beta-D-glucopyranosyloxy)but-2-enenitrile. Deacetylation of Z-and/or E-isomers afforded the target molecules alliarinoside and its isomer. (C) 2014 Elsevier Ltd. All rights reserved.