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Concise synthesis of calystegines B2 and B3via intramolecular Nozaki-Hiyama-Kishi reaction.

Authors :
Wang HY
Kato A
Kinami K
Li YX
Fleet GW
Yu CY
Source :
Organic & biomolecular chemistry [Org Biomol Chem] 2016 Jun 07; Vol. 14 (21), pp. 4885-96. Date of Electronic Publication: 2016 May 10.
Publication Year :
2016

Abstract

The key step in the concise syntheses of calystegine B2 and its C-2 epimer calystegine B3 was the construction of cycloheptanone 8via an intramolecular Nozaki-Hiyama-Kishi (NHK) reaction of 9, an aldehyde containing a Z-vinyl iodide. Vinyl iodide 9 was obtained by the Stork olefination of aldehyde 10, derived from carbohydrate starting materials. Calystegines B2 (3) and B3 (4) were synthesized from d-xylose and l-arabinose derivatives respectively in 11 steps in excellent overall yields (27% and 19%).

Details

Language :
English
ISSN :
1477-0539
Volume :
14
Issue :
21
Database :
MEDLINE
Journal :
Organic & biomolecular chemistry
Publication Type :
Academic Journal
Accession number :
27161660
Full Text :
https://doi.org/10.1039/c6ob00697c