Metabolites from the purple heartwood of mimosoideae. Part 3. Acacia crombei C. T. White: structure and partial synthesis of crombenin, a natural spiropeltogynoid
作者:Edward V. Brandt、Daneel Ferreira、David G. Roux
DOI:10.1039/p19810001879
日期:——
pirobenzofuran-3(2H)-one, the first spiropeltogynoid, is related to the concomitant crombeone (8-hydroxypeltogynone) from which it is derived via oxidation with alkaline hydrogen peroxide of the chalcone intermediate. The method of synthesis and i.r. spectroscopy define the stereochemistry as either 2(3′)R,4′R or 2(3′)S,4′S. Crombenin is accompanied by the first natural 5,6-dihydroxyphthalide.
Crombenin,4,4',6,6',7- pentahydroxyisochroman -3'- spirobenzofuran-3(2 ħ) -酮,第一spiropeltogynoid,是关系到伴随crombeone(8- hydroxypeltogynone)从其衍生自通过查尔酮中间体用碱性过氧化氢氧化。合成和红外光谱法将立体化学定义为2(3')R,4'R或2(3')S,4 'S。crombenin伴随着第一个天然的5,6-二羟基邻苯二酚。