Abstract
The mass spectra of isopropyl 2‐hydroxychlorocarbanilate indicate a preferential ortho intramolecular rearrangement which yields a chloro 2‐benzoxazolinone intermediate ion. A com‐parison of the fragmentation of ortho, meta and para hydroxy analogs of isopropyl 3‐chlorohydroxy‐carbanilate indicates the existence of an ‘ortho effect’ during the fragmentation of isopropyl‐chloro 2‐hydroxycarbanilates.