ISOPHENOLPHTHALEIN AND SOME OF ITS DERIVATIVES1

WR Orndorff, WR Barrett

Index: Orndorff; Barrett Journal of the American Chemical Society, 1924 , vol. 46, p. 2495

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Citation Number: 3

Abstract

Phenolphthalein was first prepared by Baeyer2 in 1871, but it was not until 18803 that he proved it to be di-p-dihydroxy-diphenylphthalide. Baeyer also isolated fl~ oran,~ a by- product in the preparation of phenolphthalein and explained its formation as due to the phthalic add residue entering the two phenol molecules in the ortho positions to the two hydroxyl groups instead of in the para positions. Under the influence of the condensing ...