Facile Formation of Cyclic Aminals through a Brønsted Acid-Promoted Redox Process
摘要:
Cyclic aminals were prepared through a Bronsted acid-promoted reaction. This redox neutral process involves iminium ion formation, 1.5 H-transfer, followed by ring closure.
Facile Formation of Cyclic Aminals through a Brønsted Acid-Promoted Redox Process
作者:Chen Zhang、Sandip Murarka、Daniel Seidel
DOI:10.1021/jo802325x
日期:2009.1.2
Cyclic aminals were prepared through a Bronsted acid-promoted reaction. This redox neutral process involves iminium ion formation, 1.5 H-transfer, followed by ring closure.
Selective copper(II) acetate and potassium iodide catalyzed oxidation of aminals to dihydroquinazoline and quinazolinone alkaloids
作者:Matthew T Richers、Chenfei Zhao、Daniel Seidel
DOI:10.3762/bjoc.9.135
日期:——
acetate/acetic acid/O2 and potassium iodide/tert-butylhydroperoxide systems are shown to affect the selective oxidation of ring-fused aminals to dihydroquinazolines and quinazolinones, respectively. These methods enable the facile preparation of a number of quinazoline alkaloid natural products and their analogues.