Abstract
AbstractThe initial step in the biosynthesis of suillin (1), boviquinone‐4 (2) and bovilactone‐4,4 (3) in Suillus species is the geranylgeranylation of 3,4‐dihydroxybenzoic acid at the 2‐position. Feeding experiments with advanced precursors have identified boviquinone‐4 and deacetylsuillin (9) as building blocks for the dilactone and catechol moieties, respectively, of bovilactone‐4,4 (3). In order to explain the failure of boviquinone‐4 (2) to incorporate side‐chain‐labelled deacetylsuillin (9#), an alternative sequence for the formation of 2 is proposed. During these experiments an interesting change in metabolism was noticed: after administration of larger quantities of aromatic carboxylic acids, the boviquinone‐4 present in the fruit bodies disappeared and de novo synthesis of bovilactone‐4,4 occurred. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
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