Liebigs Annalen der Chemie

The synthetic utility and mechanisms of the hydrogen iodide isomerization and the oxo reaction in the modification of chlorophyll derivatives

PH Hynninen

Index: Hynninen, Paavo H. Liebigs Annalen der Chemie, 1990 , # 9 p. 835 - 840

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Citation Number: 5

Abstract

Abstract Hydrogen iodide in glacial acetic acid has served as a versatile reagent in modifications of chlorophyll and its closely related derivatives, eg pheophorbides and 3- vinylchlorins, to 3-ethyl-porphyrins (HI isomerization) or to 3 1-oxoporphyrins (oxo reaction). Nevertheless, the mechamisms of these important reactions have remained obscure. In this paper, the reaction conditions used by H. Fischer for the HI isomerization and the oxo ...