D-a-Glucoheptose

On nitration it produces an expl compd d-a-Glucoheptose Hexonitrote,... 

Haworth, Hirst and Stacey showed that when either pentaacetyl-a-D-(o)-glucoheptosyl bromide or pentaacetyl-a-D-(a)-glucoheptosyl chloride, was refluxed for ten minutes in dry ether containing freshly prepared activated silver chloride, pentaacetyl-j3-n-(a)-glucoheptosyl chloride was obtained in almost quantitative yield. The transformations were somewhat capricious and their course could not always be predicted with certainty. The crystalline acetyl- -glycosyl chloride was heated for five hours at 70° with methyl alcohol and quinoline and maintained overnight at room temperature. Tetraacetyl-D-(a)-glucoheptose methyl... 

On nitration it produces an expl compd d-a-GIucoheptose Hexanitrate, O3NQ.CH3(CH.ONQ2)s.CH0 mw 480.18 N 17.50%, OB to COa +3-33% colorless ndls (from ale) mp 100° reduces Fehling s soln on warning. Can be prepd by nitrating d-o-Glucoheptose (Refs 2, 3 4). It is a powerful expl... 

There are studies that indicate a particular mode of action as a natural algicide, without elucidating that it is a primary site. For example, Kida [140,141] reported that the Streptomyces purpeofuscus product 7-deoxy-D-glycero-D-glucoheptose inhibited chlorophyll synthesis in the green alga Scenedesmus obliquus. Yet, only chlorophyll accumulation was measured. Phytotoxins with many other sites of action could cause a similar effect. 

Fig. 10. A. Chromatogram of a standard mixture of sugars analysed under conditions (b) Table III. Five nanomole of each sugar injected. Peak identity 2-d-GAL = 2-deoxygalac-tose 2-d-RIB = 2-deoxyribose CELL = cellobiose RHAM = rhamnose MAL = maltose LAC = lactose R/B = ribose AfAAf = mannose FRt/C = fructose ARA = arabinose FCC = fucose GAL = galactose XFL = xylose MAN-//RR = mannoheptulose GLU-HEP = glucoheptose GLU = glucose.

A structural study of 2-amino-2-deoxy-D-glycero-L-glucoheptose (4) in solution using H-n.m.r. data has shown that the o(. /3 anomeric ratio is 66 34 Some acylated derivatives, including the peracetate. 

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