Synthesis 2014; 46(09): 1177-1184
DOI: 10.1055/s-0033-1340853
paper
© Georg Thieme Verlag Stuttgart · New York

Total Synthesis of the Z-Isomers of the Proposed and Revised Structures of Aspergillide B via an Iodocyclization and Ring-Closing Metathesis Strategy

Tapas R. Pradhan
Natural Products Chemistry Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India   Fax: +91(40)27160512   Email: mohapatra@iict.res.in
,
Pragna P. Das
Natural Products Chemistry Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India   Fax: +91(40)27160512   Email: mohapatra@iict.res.in
,
Debendra K. Mohapatra*
Natural Products Chemistry Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India   Fax: +91(40)27160512   Email: mohapatra@iict.res.in
› Author Affiliations
Further Information

Publication History

Received: 04 January 2014

Accepted after revision: 03 February 2014

Publication Date:
26 February 2014 (online)


Abstract

The synthesis of Z-isomers of both the proposed and revised structures of aspergillide B is described. A divergent route is employed that involves kinetically controlled ring-closing metathesis for the construction of a 14-membered macrocyclic ring, ester formation under Yamaguchi conditions, a Wacker-type oxidative cyclization for creation of the C4 stereogenic center and a previously reported diastereoselective isomerization–iodocyclization strategy for the construction of the 2,6-trans-disubstituted tetrahydropyran subunit.

Supporting Information

 
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