Abstract
The microbiological transformation of candidiol (15α,18-dihydroxy- ent-kaur-16-ene) by Mucor plumbeus led to 3β,15α,18-trihydroxy- ent-kaur-16-ene, 6α,15α,18-trihydroxy- ent-kaur-16-ene, 3α,15α,18-trihydroxy- ent-kaur-16-ene, 11β,15α,18-trihydroxy- ent-kaur-16-ene and 15α,17,18-trihydroxy-11β,16β-epoxy- ent-kaurane, whilst the incubation of 15α,19-dihydroxy- ent-kaur-16-ene gave 9β,15α,19-trihydroxy- ent-kaur-16-ene, 3α,15α,19-trihydroxy- ent-kaur-16-ene, 11β,15α,19-trihydroxy- ent-kaur-16-ene, 6α,15α,19-trihydroxy- ent-kaur-16-ene, 15α,17,19-trihydroxy-11β,16β-epoxy- ent-kaurane, 19-(β- d-glucopyranosyl)-15α-hydroxy- ent-kaur-16-ene and 19-(β- d-glucopyranosyl)-15-oxo- ent-kaur-16-ene. An interesting rearrangement in dilute acid medium of 9β,15α,19-trihydroxy- ent-kaur-16-ene into 16-oxo-19-hydroxy- ent-abiet-8(9),15-diene, is also described in this work.
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