Asymmetric Synthesis of the DEFG Rings of Solanoeclepin A.

Starting from ( R)-seudenol, an asymmetric synthesis of the DEFG rings of solanoeclepin A has been developed. The key transformations include the substrate-controlled asymmetric Staudinger ketene cycloaddition and the intramolecular aldol reaction leading to the tricyclo[5.2.1.01,6]decane core of solanoeclepin A in 10 steps in the longest reaction sequence.