The chemistry of fungi. Part LXI. The synthesis of (±)-sclerotiorin, of (±)-4,6-dimethylocta-trans-2,trans-4-dienoic acid, and of an analogue of rotiorin

Syntheses of (±)-sclerotiorin, the principal pigment of several fungi including Penicillium multicolor and P. sclerotiorum, of (±)-4,6-dimethylocta-trans-2,trans-4-dienoic acid [a major degradation product of (+)- and of (–)-sclerotiorin] and of (+)-5-chloroisorotiorin, an angular analogue of rotiorin, are described.