Synthesis 2016; 48(21): 3753-3762
DOI: 10.1055/s-0035-1562438
paper
© Georg Thieme Verlag Stuttgart · New York

Synthesis of d-Fagomine and Its Seven- and Eight-Membered Higher-Ring Analogues, and the Formal Synthesis of (+)-Australine from l-Xylose-Derived Chiron

Pintu Das
Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute (CSIR-CDRI), Sector 10, Jankipuram Extension, Sitapur road, Lucknow-226031, U. P., India   Email: akshaw55@yahoo.com
,
Sama Ajay
Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute (CSIR-CDRI), Sector 10, Jankipuram Extension, Sitapur road, Lucknow-226031, U. P., India   Email: akshaw55@yahoo.com
,
Arun K. Shaw*
Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute (CSIR-CDRI), Sector 10, Jankipuram Extension, Sitapur road, Lucknow-226031, U. P., India   Email: akshaw55@yahoo.com
› Author Affiliations
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Publication History

Received: 06 April 2016

Accepted after revision: 10 May 2016

Publication Date:
29 June 2016 (online)


These authors contributed equally to this work.

Abstract

The synthesis of d-fagomine and its seven- and eight-membered higher-ring analogues from commercially available l-xylose is reported. The syntheses involve elaboration of a common alkenol precursor obtained from l-xylose-derived hemiacetal. The key steps in the syntheses are intramolecular reductive amination and ring-closing metathesis for the synthesis of d-fagomine and seven-/eight-membered iminosugar, respectively. We have also extended our synthetic strategy for the formal synthesis of (+)-australine using zinc-mediated fragmentation reaction and ring-closing metathesis as key steps.

Supporting Information