作者:Christopher D. Gabbutt、John D. Hepworth、Michael W. J. Urquhart、Luis Millan Vazquez de Miguel
DOI:10.1039/a700375g
日期:——
An efficient two step procedure for the synthesis of
2,3,4,9-tetrahydro-1H-xanthene-1,9-diones is described. A study
of their conjugate additions has shown them to be efficient Michael
acceptors. Reaction of 2,3,4,9-tetrahydro-1H-xanthene-1,9-dione
with tris(methylthio)methyllithium, followed by mercury(II)
catalysed methanolysis, gave methyl
1-hydroxy-9-oxo-3,4,4a,9-tetrahydro-2H-xanthene-4a-carboxylate,
the nucleus of the secalonic acids and other natural products
介绍了一种合成2,3,4,9-四氢-1H-咕吨-1,9-二酮的高效两步法。研究了它们的共轭加成反应,发现它们是有效的迈克尔受体。将2,3,4,9-四氢-1H-咕吨-1,9-二酮与三(甲硫基)甲基锂反应后,经过汞(II)催化的甲醇解反应,得到了甲基1-羟基-9-氧代-3,4,4a,9-四氢-2H-咕吨-4a-羧酸酯,即黑麦菌酸及其他天然产物的核结构。