Tricolorin A (1) is a novel tetrasaccharide macrolactone that is a natural herbicide. In this paper is reported a totalsynthesis of 1. Coupling of hydroxy ester 18 with D-fucosyl trichloroacetimidate 23 gave fucoside 24. Removal of the C-2 pivaloyl group of 24 followed by coupling with D-glucosyl trichloroacetimidate 29 resulted in isolation of disaccharide 30. Saponification of the ester groups of
The totalsynthesis of the anticancer marinenaturalproduct mycalol has been achieved using a Maruoka asymmetric allylation, a Noyori asymmetric reduction, an asymmetric alkynylation, and a zipper reaction as key steps.