Fungal catalysis of sclareolide (1) using Mucor plumbeus (ATCC 4740), Cunninghamella blakesleeana (ATCC 9245), Cunninghamella echinulata (ATCC 9244), Curvularia lunata (ATCC 12017) and Aspergillus niger (ATCC 1004), was performed. Cunninghamella blakesleeana (ATCC 9245) metabolized compound 1 to afford O6-sclareolide (2), 3β,6α-dihydroxysclareolide (3), 9-hydroxysclareolide (4), along with three known metabolites, 1β,3β-dihydroxysclareolide (5), 3-oxosclareolide (6) and 3β-hydroxysclareolide (7). Biotransformation experiments of compound 1 with Cunninghamella echinulata (ATCC 9244) also yielded two new compounds, 5-hydroxysclareolide (8), and 7β-hydroxysclareolide (9) along with two known compounds 5 and 7. Spectroscopic methods were used to establish the structures of compounds 2—9. Compounds 2—9 exhibited modest acetylcholinesterase inhibitory activity.
使用 Mucor plumbeus (A
TCC 4740)、Cunninghamella blakesleeana (A
TCC 9245)、Cunninghamella echinulata (A
TCC 9244)、Curvularia lunata (A
TCC 12017) 和黑曲霉 (A
TCC 1004) 对
香紫苏内酯 (1) 进行了真菌催化。Cunninghamella blakesleeana(A
TCC 9245)代谢了化合物 1,生成了 O6-sclareolide(2)、3β,6α-dihydroxysclareolide(3)、9-hydroxysclareolide(4)以及三种已知代谢产物 1β,3β-dihydroxysclareolide(5)、3-oxosclareolide(6)和 3β-hydroxysclareolide(7)。化合物 1 与 Cunninghamella echinulata(A
TCC 9244)的
生物转化实验也产生了两种新化合物,5-羟基
香紫苏内酯(8)和 7β-hydroxysclareolide (9),以及两种已知化合物 5 和 7。利用光谱方法确定了化合物 2-9 的结构。化合物 2-9 具有适度的
乙酰胆碱酯酶抑制活性。