Synthesis of α-oxygenated ketones and substituted catechols via the rearrangement of N-enoxy- and N-aryloxyphthalimides
作者:Michelle A. Kroc、Aditi Patil、Anthony Carlos、Josiah Ballantine、Stephanie Aguilar、Dong-Liang Mo、Heng-Yen Wang、Daniel S. Mueller、Donald J. Wink、Laura L. Anderson
DOI:10.1016/j.tet.2017.01.061
日期:2017.7
synthesis of α-oxygenated carbonylcompounds and catechols is the treatment of a carbonylcompound or a phenol with an electrophilic oxygen source. As an alternative approach to these important structures, formal [3,3]-rearrangements of N-enoxyphthalimides, N-enoxyisoindolinones, and N-aryloxyphthalimides have been explored. When used in combination with an initial Chan-Lam coupling, these transformations
Preparation of α-Oxygenated Ketones by the Dioxygenation of Alkenyl Boronic Acids
作者:Aditi S. Patil、Dong-Liang Mo、Heng-Yen Wang、Daniel S. Mueller、Laura L. Anderson
DOI:10.1002/anie.201202704
日期:2012.7.27
Two in two: Dioxygenation of alkenylboronicacids has been achieved with N‐hydroxyphthalimide. The two‐step process involves etherification of an alkenylboronicacid with N‐hydroxyphthalimide followed by a [3,3] rearrangement. The dioxygenated product can then be hydrolyzed to form either the corresponding α‐hydroxy ketone or the α‐benzoyloxy ketone.
The synthesis of α-hydroxyketones through the dioxygenation of alkynes is reported. The reaction is mediated by an Feporphyrin complex and pinacolborane at room temperature under air as a green oxidant, furnishing α-hydroxyketones in up to 93% yields. The mild reaction conditions allow chemoselective oxidation with good functional group tolerance.