Souris C, Misale A, Chen Y, Luparia M, Maulide N. From Stereodefined Cyclobutenes to Dienes: Total Syntheses of Ieodomycin D and the Southern Fragment of Macrolactin A.
Org Lett 2015;
17:4486-9. [PMID:
26349917 DOI:
10.1021/acs.orglett.5b02149]
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Abstract
A copper-promoted flexible synthesis of cyclobutenes carrying simple alkyl chains, enabling even the most hindered nucleophiles to be employed, has been developed. The versatility of this approach was exemplified by a short total synthesis of ieodomycin D and a straightforward preparation of the southeastern fragment of macrolactin A. The latter features a late-stage, double cyclobutene electrocyclic ring opening that directly delivers a bis-diene of defined geometry.
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