The synthesis of phthalazin-1(2H)-ones and 3-hydroxyisobenzofuran-1(3H)-ones via the ring contraction of tropones

Phthalazin-1(2H)-ones and 3-hydroxyisobenzofuran-1(3H)-ones were synthesized by the reactions of tropones with hydrazines and alcohols, respectively, via the ring contraction. (C) 2010 Elsevier Ltd. All rights reserved.