Get Advances in Carbohydrate Chemistry, Vol. 3 PDF

By W.W. Pigman, M.L. Wolfrom, Stanley Peat (Eds.)

ISBN-10: 0120072033

ISBN-13: 9780120072033

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Accordingly D-galactose phenylosazone has been designated as D-tagatopyranose phenylosazone. Contrary views have been expressed by Enge123who also carried out methylation experiments with D-glucose phenylosazone. 0% should have been obtained. This result therefore is not in conflict with the cyclic structure. The main evidence brought forward by Engel in support of an open chain formula for the sugar osazones is the similarity in the absorption spectra of a series of sugar osazones and osazone derivatives including D-glyceraldehyde phenylosazone, which would not be expected t o be cyclic.

Untersuchungen,” p. 1 (16) Private information from Dr. Rosanoff has recently brought to light an interesting historical matter. I n the manuscript of his original article and 011 the figure which accompanies it he used the capital D and L. The editor of the journal persuaded him to recommend instead the Greek 6 and A, and the manuscript waa changed accordingly. The figure, however, was not altered and thus the reader finds the original D and L in it. Rosanoff’s proposal of the 6 and symbols has not been accepted by others.

60,455 (1917). 10 C. 8. HUDSON gradual steps as new experimental facts came to light. What appears to be the first step in this historical order of development is shown through the following free translation from his article8 in which the naming of the enantiomorphous forms of mannose and mannitol and several of their derivatives is discussed. It will be advantageous to retain thc old names mannose and mannitc in designating the ncw products, but the distinction of enantiomorphs by the terms dextro- and levo-rotatory seems to me inadvisable on the following grounds.

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Advances in Carbohydrate Chemistry, Vol. 3 by W.W. Pigman, M.L. Wolfrom, Stanley Peat (Eds.)

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