A Concise Synthetic Approach to the Sorbicillactones: Total Synthesis of Sorbicillactone A and 9-<i>epi</i>-Sorbicillactone A
作者:Kelly A. Volp、Diane M. Johnson、Andrew M. Harned
DOI:10.1021/ol201211f
日期:2011.9.2
A concise (12 step) totalsynthesis of sorbicillactone A and 9-epi-sorbicillactone A is reported. Unlike typical routes to the sorbicillinoids, this strategy does not start from sorbicillin and allows for the production of the bicyclic core on a multigram scale. The intramolecular conjugate addition of a tethered malonate serves as an effective means of introducing the lactone ring and provides a synthetic
Origin of Stereoselectivity of the Alkylation of Cyclohexadienone-Derived Bicyclic Malonates
作者:Kelly A. Volp、Andrew M. Harned
DOI:10.1021/jo4011238
日期:2013.8.2
The diastereoselectivity of the alkylation of bicyclic malonates has been studied experimentally and computationally. In accordance with previous observations during a total synthesis of sorbicillactone A, alkylations involving methyl iodide proceed from the concave (endo) face of the bicyclo[4.3.0]nonene ring system. In contrast, carbon-based electrophiles larger than methyl iodide approach from the