Autoxidation of Intermediary Mesoionic 1,3-Oxazolium-5-olates Generated from Cyclic N-Acyl .ALPHA.-Amino Acids.
作者:Masami KAWASE
DOI:10.1248/cpb.45.1248
日期:——
Mesoionic 1, 3-oxazolium-5-olates (munchnones) react fairly rapidly with oxygen to give the autoxidation products when the C-4 substituent is aromatic. The autoxidation occurred in the munchnones generated from N-acyl tetrahydroisoquinoline-1-carboxylic acids or tetrahydro-β-carboline-1-carboxylic acids. The mechanism was elucidated by 18O labeling experiments and involved a series of well-precedented autoxidative processes including oxygenation, cyclization of the resulting peroxy anion, and oxidative cleavage.