Assembly of 13-membered TCC macrocyclic trienes are described and their tra
nsannular Diels-Alder reaction are investigated as a model study for the as
ymmetric synthesis of the ABC-ring system of(+)-maritimol. Albeit the origi
nal expectations that the pro-3(S)- and 4(R)-functionalities induce perfect
absolute and relative control in the strategic step has not been fully met
, a position at pro-12(R) complying with these requirements is recognized.
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