In an accompanying communication, the rearrangement by acid of 1, 4-cholestadienone-3 to 3-hydroxy-1-methyl-1 O-norcholestatriene-1, 3, 5 is considered. 4* 6 This reaction, which may be termed the dienone-phenol rearrangement, is analogous to the well-known rearrangement of santonin (I) to destiiotroposantoniii (11), 6 and
