Studies on the resorcylates: biomimetic total syntheses of (+)-montagnetol and (+)-erythrin
摘要:
6-(2,4-Dioxopentyl)-2,2-trimethyl-4H-1,3-dioxin-4-one on reflux in toluene gave MeCOCH2COCH2 COCH=C=O, which cyclized to 6-(2-oxopropyl)-4-hydroxy-2H-pyrin-2-one or was trapped with alcohols to produce resorcylate esters. The method was used for the synthesis of both enantiomers of montagnetol and erythrin. (c) 2009 Elsevier Ltd. All rights reserved.
6-(2,4-Dioxopentyl)-2,2-trimethyl-4H-1,3-dioxin-4-one on reflux in toluene gave MeCOCH2COCH2 COCH=C=O, which cyclized to 6-(2-oxopropyl)-4-hydroxy-2H-pyrin-2-one or was trapped with alcohols to produce resorcylate esters. The method was used for the synthesis of both enantiomers of montagnetol and erythrin. (c) 2009 Elsevier Ltd. All rights reserved.
Bio‐guided Isolation of Alpha‐glucosidase Inhibitory Compounds from Vietnamese Lichen Roccella montagnei
alpha-glucosidase inhibition. Six compounds were isolated and structurallyelucidated, including a new ortho depside, montagneside A (1), together with five known compounds, sekikaic acid (2), lanost-7-en-3β-ol (3), ethyl orsellinate (4), D-montagnetol (5), and D-erythrin (6). Their chemical structures were identified by extensive 1D and 2DNMRanalysis, high-resolution mass spectroscopy, and comparisons with those