Syntheses of differentially protected isocoumarins
作者:Andrew N. Lowell、Philip D. Wall、Stephen P. Waters、Marisa C. Kozlowski
DOI:10.1016/j.tet.2010.05.077
日期:2010.7
Syntheses of an isocoumarin subunit suitable for the completion of purpuromycin are outlined. Specifically, work targeting an orthogonally protected isocoumarin (eventually 12% yield over 12 steps) and an improved synthesis of a symmetrically protected isocoumarin (18% over 10 steps) are described. A new modification for selective catechol protection as mediated by potassium bicarbonate is also presented