Synthesis of the fungal natural product (-)-xylariamide A

Abstract

The first synthesis of the fungal natural product (-)-xylariamide A 1 is reported. N,O-Bis(trimethylsilyl)acetamide induced coupling of D-tyrosine with (E)-but-2-enedioic acid 2,5-dioxo-pyrrolidin-1-yl ester methyl ester 5 produced the dechloro natural product 6, which was subsequently monochlorinated using oxone and KCl to yield synthetic 1. (-)-Xylariamide A 1, (+)-xylariamide A 2 and (-)-dechloroxylariamide A 6 displayed no cytotoxic or antimicrobial activity.