Carbohydrate Research p. 113 - 120 (1991)
Update date:2022-08-17
Topics:
Lindberg, Bengt
Lindberg, Johan
Pitha, Josef
Rao, C. Trinadha
Harata, Kazuaki
On alkylation of cyclomaltoheptaose with oxiranes, promoted by alkali of low concentration, substitution at secondary positions, particularly at O-2, is favoured.The reaction has been used to prepare the 2-O-<(R)- and (S)-2-hydroxypropyl>, 2-O-(2-hydroxy-2-methylpropyl), 2-O-<(R)- and (S)-2,3-dihydroxypropyl>, and 2-O-<(R)- and (S)-2,3-dihydroxy-2-methylpropyl)derivatives.Each of these derivatives is less soluble in water than cyclomaltoheptaose, and their complexes with toluene, in contrast to that of cyclomaltoheptaose, are well soluble in water.
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