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We report a study of the glucuronidation of a number of important steroidal secondary alcohols. The alcohols studied are androsterone 7, epiandrosterone 8, 17-acetoxy-androstane-3α,17β-diol 9, 11α-hydroxyprogesterone 10, and 3-benzoylestradiol 11. These were first glucuronidated using the Schmidt trichloroacetimidate method with variations in acyl substituent (viz. derivatives 2 and 3), Lewis acid catalyst and order of addition. The results are contrasted with those obtained using our recently described glycosyl iodide donor 4, catalysed either by N-iodosuccinimide (NIS) or various metal salts.

Graphical abstract: Glucuronidation of steroidal alcohols using iodosugar and imidate donors

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