Glucuronidation of steroidal alcohols using iodosugar and imidate donors
作者:John R. Harding、Clare D. King、Jennifer A. Perrie、Deborah Sinnott、Andrew V. Stachulski
DOI:10.1039/b412217h
日期:——
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.
The photolysis, in solution, of steroidal 17-nitrile esters gives rise to the 17a-aza-D-homo-17a-ol 17-one system. This hydroxamic acid grouping is considered to arise via carbon-carbon fission of an intermediary alkoxy radical. The isolation, from one and the same photolysis mixture, of two isomeric hydroxamic acids shown to be epimeric at C-13 supports the proposal of ring fission between C-13 and
Simple method of preparation of 5 alpha-androstane-3 alpha,17 beta-diol 17-O-glucuronide N-histaminyl amide was developed for the construction of immunoanalytical kit. Improved method of glucuronide derivative synthesis was used, followed by hydroxybenzotriazole-dicyclohexylcarbodiimide coupling with histamine. (C) 2016 Elsevier Inc. All rights reserved.