Manganese catalyzed direct regio- and stereoselective hydroxylation of 5α- and 5β-androstane derivatives
作者:Roman V. Ottenbacher、Denis G. Samsonenko、Anna A. Bryliakova、Andrey A. Nefedov、Konstantin P. Bryliakov
DOI:10.1016/j.jcat.2023.06.003
日期:2023.9
absolute chirality of the catalyst, mono-hydroxylation at A, B, or C rings is achieved in up to 58% isolated yield. Strongly hydrogen-bond donating solvent hexafluoroisopropanol (HFIP) effectively protects the C17–OH group in etiocholan-17β-ol-3-one from ketonization, thus providing an opportunity to obtain 6,17- and 12,17-dihydroxy androstane derivatives without using protectinggroups.