The allene–diyne natural product nemotin was synthesized for the first time through an enantioselective route with the stereogenic center at the lactone moiety derived from L-glutamic acid and the allene axis constructed from the corresponding propargylic tosylate, and the absolute configuration was thus established as (4S,5aS).
The total synthesis of sapinofuranones A,B and ent-sapinofuranones A,B and L-factor has been described. A series of novel 1,2,3-triazole-sapinofuranone hybrids were efficiently synthesized employing a click chemistry approach. These sapinofuranones and 1,2,3-triazole-sapinofuranone hybrids were further evaluated for their cytotoxic activity against four human cancer cell lines (A549, MDA-MB-231, DU145