Abstract:
:The ring closing metathesis/transannular etherification approach to the englerin nucleus was adapted to provide two key intermediates for analogue synthesis: the 4-desmethyl Δ5,6 tricycle and the 4-oxo Δ5,6 tricycle. The former was elaborated to 4-desmethyl englerin A and the latter served as a common precursor for englerin A, 4-ethyl englerin A, and 4-isopropyl englerin A. 4-Desmethyl englerin A was less active than the natural product by an order of magnitude, but the 4-ethyl and 4-isopropyl analogues were comparable in activity to englerin A. These results are consistent with the premise that the 4-alkyl group enforces the binding conformation of the cinnamoyl ester substituent. Furthermore, they suggest that 4-alkyl englerin structures may prove to be useful tool compounds.
journal_name
ACS Med Chem Lettjournal_title
ACS medicinal chemistry lettersauthors
Elliott DC,Beutler JA,Parker KAdoi
10.1021/acsmedchemlett.7b00161subject
Has Abstractpub_date
2017-06-06 00:00:00pages
746-750issue
7issn
1948-5875journal_volume
8pub_type
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