Importance of a 4-Alkyl Substituent for Activity in the Englerin Series.

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 Lett

authors

Elliott DC,Beutler JA,Parker KA

doi

10.1021/acsmedchemlett.7b00161

subject

Has Abstract

pub_date

2017-06-06 00:00:00

pages

746-750

issue

7

issn

1948-5875

journal_volume

8

pub_type

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