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D-Altropyranose pentaacetate

In an extension to aldohexose peracetates, the favored form of a-D-idopyranose pentaacetate in solution in acetone or chloroform was found to be the CJ(d) conformer, having four substituents axially and one equatorially attached. a-D-Altropyranose pentaacetate had previously been reported also to adopt the CJ(d) conformation, having three substituents axial and two equatorial. Consideration of the observed proton spin-couplings allowed the exclusion of the boat or skew forms as major contributors to the conformational populations for both compounds near room temperature. [Pg.87]

Debenzylation of 122 and 123, followed by acetylation, afforded the pentaacetates 98 and 124, which were respectively converted into carba-a-D-glucopyranose (99) and carba-/ -L-altropyranose (125) on hydrolysis. ... [Pg.42]

See other pages where D-Altropyranose pentaacetate is mentioned: [Pg.152]    [Pg.44]    [Pg.181]    [Pg.724]    [Pg.102]    [Pg.101]    [Pg.148]    [Pg.152]    [Pg.131]    [Pg.152]    [Pg.44]    [Pg.181]    [Pg.724]    [Pg.102]    [Pg.101]    [Pg.148]    [Pg.152]    [Pg.131]    [Pg.271]   
See also in sourсe #XX -- [ Pg.181 ]



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Altropyranose

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