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
Synthesis of Spirocyclic 1‐Pyrrolines from Nitrones and Arynes through a Dearomative [3,3′]‐Sigmatropic Rearrangement
作者:Abdullah S. Alshreimi、Guanqun Zhang、Tyler W. Reidl、Ricardo L. Peña、Nicholas‐George Koto、Shahidul M. Islam、Donald J. Wink、Laura L. Anderson
DOI:10.1002/anie.202004652
日期:2020.8.24
A dearomative [3,3′]‐sigmatropic rearrangement that converts N‐alkenylbenzisoxazolines into spirocyclic pyrroline cyclohexadienones has been developed by using the dipolar cycloaddition of an N‐alkenylnitrone and an aryne to access these unusual transient rearrangement precursors. This cascade reaction affords spirocyclic pyrrolines that are inaccessible through dipolar cycloadditions of exocyclic