Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... We report here a simple and efficient preparation of 1H-azepin-5(2H)-ones and their unexpectedly facile isomerization to 1H-azepin-5(4H)-ones under mildly basic reaction conditions. ... We report here a simple and efficient preparation of 1H-azepin-5(2H)-ones and their unexpectedly facile ...