作者:Michael E. Green、Jason C. Rech、Paul E. Floreancig
DOI:10.1002/anie.200802548
日期:2008.9.8
The total synthesis of the potent cytotoxin theopederin D has been achieved through the use of an oxidative carbon–carbon bond cleavage reaction to form an acyliminium ion in the presence of acid labile acetal groups Other key transformations include an acid mediated functionalization of a tetrahydrofuranyl alcohol in the presence of a tetrahydropyranyl alcohol, a syn-selective glycal epoxide opening, and a catalytic asymmetric aldehyde-acid chloride condensation.
An Oxidative Entry into the Amido Trioxadecalin Ring System
作者:Jason C. Rech、Paul E. Floreancig
DOI:10.1021/ol034273l
日期:2003.5.1
system is a key structural component of the architecturally interesting anticancer and immunosuppressive agents of the mycalamide, theopederin, and onnamide families of natural products. We report a new entry into this structure in which a mixed acetal serves as a surrogate for a formaldehyde hemiacetal in an addition to an oxidatively generated acyliminium ion. The stereochemical outcome of this process