Publication Type
Publication Type
Peer Reviewed Journal
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Authors
Nkambule, CM,Kwezi, NW,Kinfe, HH,Nokwequ, MG,Gammon, DW,Oscarson, S,Karlsson, E;
Year
2011
Month
January
Journal
Tetrahedron
Title
Efficient regioselective protection of myo-inositol via migration facile protecting group
Status
Published
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MYO-INOSITOL MYCOBACTERIUM-SMEGMATIS MYCOTHIOL DERIVATIVES BIOSYNTHESIS SULFONYLATION ORTHOESTERS THIOL ORTHOFORMATE ANTIBIOTICS
Volume
67
Issue
Start Page
618
End Page
623
Abstract
A cis-1,2-cyclohexanediol, 1,4,5,6-tetra-O-benzyl-myo-inositol, was selectively protected at the axial C2-hydroxyl via acid-mediated rearrangement of the corresponding 1,2-orthoacetate, or via the base-induced migration of a protecting group that had previously been easily installed with complete regioselectivity at the adjacent equatorial hydroxyl. Esters 4a-6a were synthesized in high yields (75-82%) while sulfonate 7a and silyl ether 8a were obtained in 85 and 31% yields, respectively. The migration of the esters induced by DBU results in equilibrium between regioisomers favouring the C2 protected isomer, but NaH induced migration of sulfonyl and silyl groups results in complete migration from equatorial to axial hydroxyl groups. (C) 2010 Elsevier Ltd. All rights reserved.
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DOI Link
DOI 10.1016/j.tet.2010.11.063
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