Certain 2-substituted N-acylphenothiazines undergo a rapid intramol≐cular N→C migration on reaction with lithium N,N-dialkylamides at −78°. Preliminary studies of the scope and mechanism of this anionic version of the Fries rearrangement are reported.
                                    某些2-取代的N-酰基
吩噻嗪在-78°与N,N-二烷基酰胺
锂反应时会经历快速的分子内N→C迁移。据报道,该阴离子形式的Fries重排的范围和机理的初步研究。