کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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70741 | 48844 | 2011 | 5 صفحه PDF | دانلود رایگان |
The capabilities of twenty strains of filamentous fungi (from 9 genera) to transform deoxyandrographolide (1) were screened. And eleven derivatives of 1 transformed by Cunninghamella echinulata AS 3.3400 were isolated. Their chemical structures were identified by spectral methods including 2D NMR. Among them, 3-oxo-7α-hydroxy-14-deoxyandrographolide (2), 3-oxo-8β,17α-epoxy-14-deoxyandrographolide (3), 8α-formyl-14-deoxyandrographolide (4), 8β-methoxyl-17α-hydroxyl-14-deoxyandro-grapholide (5) and 3α,17,19-trihydroxyl-7,13-ent-labdadien-15,16-olide (6), are new compounds. And their structure–activity relationships (SAR) were also discussed.
Figure optionsDownload as PowerPoint slideResearch highlights▶ Eleven transformed products from biotransformation of deoxyandrographolide by C. echinulata. And Five of them were novel compounds. ▶ The structure-activity relationships (SAR) of bioconversion products and proposed biosynthetic pathways were listed. ▶ Hydroxylation was the main biotransformation reaction which providing more functional hydroxyl groups for semi-synthesis of ester derivatives.
Journal: Journal of Molecular Catalysis B: Enzymatic - Volume 68, Issue 2, February 2011, Pages 187–191