The total synthesis of (+/-)-mevashuntin, a structurally unique naturally occurring pyrano-naphthoquinone-thiazolone, is described. The route is centered upon a late stage regioselective Diels-Alder reaction between two highly functionalized components, as well as an improved protocol for the one pot synthesis of benzothiazolones from ortho-bromoaryl isothiocyanates. The strategy results in a highly convergent route, providing access to the natural product in 11 steps from 3-(4-methoxyphenoxy)propanol and confirming its relative stereochemistry.
Hole Transfer Processes in <i>meta-</i> and <i>para-</i>Conjugated Mixed Valence Compounds: Unforeseen Effects of Bridge Substituents and Solvent Dynamics
accelerate the hole transfer (HT) between redox sites attached in para- or in meta-positions to a central benzene bridge, we investigated three series of mixed valence compounds based on triarylamine redox centers that are connected to a benzene bridge via alkyne spacers at para- and meta-positions. The electron density at the bridge was tuned by substituents with different electron donating or accepting
The total synthesis of (+/-)-mevashuntin, a structurally unique naturally occurring pyrano-naphthoquinone-thiazolone, is described. The route is centered upon a late stage regioselective Diels-Alder reaction between two highly functionalized components, as well as an improved protocol for the one pot synthesis of benzothiazolones from ortho-bromoaryl isothiocyanates. The strategy results in a highly convergent route, providing access to the natural product in 11 steps from 3-(4-methoxyphenoxy)propanol and confirming its relative stereochemistry.