Biomimetic Macrocycle-Forming Diels−Alder Reaction of an Iminium Dienophile: Synthetic Studies Directed Toward Gymnodimine
作者:Jeffrey W. Johannes、Steve Wenglowsky、Yoshito Kishi
DOI:10.1021/ol051553n
日期:2005.9.1
The macrocyclic core of gymnodimine has been constructed via an intramolecularDiels-Alderreaction of an alpha,beta-unsaturated iminium dienophile in water. The cycloaddition furnished a single exo-product, along with two endo-products. Through X-ray analysis of a suitable derivative, the stereochemistry of the exo-product was established, thereby demonstrating that its stereochemistry matches that