Synthetic Communications p. 1076 - 1083 (2009)
Update date:2022-08-10
Topics:
Liu, Jin
Zhu, Hong-You
Cheng, Xiao-Hong
Chromium trioxide and N-hydroxyphthalimide (NHPI) supported on activated clay could serve as an efficient and mild oxidant for allylic selective oxidation of Δ5-sterols. Thus, a ketone group could be easily introduced into the allylic position of Δ5-sterols with the existence of a sensitive 3β-hydroxyl group. The oxidant residue can be removed easily from the reaction mixture by filtration and reused after reactivation at 120δC for 4-6 h. Copyright Taylor & Francis Group, LLC.
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