Proton Acid-Catalysed Transformations of Estrogen Derivatives: New Results and Some Mechanistic Aspects of theKober Colour Reaction
作者:Ulf Pindur、Thomas Schall
DOI:10.1002/ardp.19943271007
日期:——
3‐O‐methylated estrogenderivatives 1a‐d and α‐estradiol (1e) underwent sulfuric acid‐catalysed transformations to furnish the steroids 2–6. The processes involved in the reaction sequence are regioselective sulfonation and, above all, the Wagner‐Meerwein rearrangement of the methyl group at C‐13. With the objective of obtaining further information on the course of the Kober colour reaction of estrogens, some