Abstract
A total synthesis of 6-<i>O</i>-benzoylzeylenol from diacetone glucose is described. The key steps were a crossed aldol–Cannizzaro reaction to create a quaternary carbon stereocenter, and cyclization through ring closure metathesis (RCM). Of the four stereogenic centers, two were derived from diacetone glucose, the quaternary stereocenter was created by means of the crossed aldol–Cannizzaro reaction, and the fourth stereogenic center was produced by a Sharpless asymmetric epoxidation. Finally, cyclization through RCM and deprotection by removal of a benzyl group with titanium(IV) chloride gave the target molecule.
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