title: Preparation of highly hindered steroid esters: application of some newer methods of esterification.
abstract: The scope and limitation of some recent acylation methods were investigated as applied to the preparation of steroidal esters of highly hindered acids. As representative steroids, 19-nor-17 alpha-ethinyl testosterone (19-NET) and testosterone, and as representative acid, pivalic (trimethylacetic) acid were used.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D007202:Indicators and Reagents; D008722:Methods; D009640:Norethindrone / Q000031:analogs & derivatives*; D013739:Testosterone / Q000031:analogs & derivatives
chemical_list: D007202:Indicators and Reagents; C023640:testosterone pivalate; D013739:Testosterone; C023641:norethindrone pivalate; D009640:Norethindrone