3-Heptulose D-altro

Heptoses, chromatography of, 287-289 from bacterial polysaccharide, 302 in bacteria, 286, 287 methylated, 288 periodate oxidation of, 288, 289 —> n-glyeero-D-galacto-, 320 —, v-glycero-D-manno-, 288, 320 —, D-glycero-L-numno-, 287, 319, 320, 326 —, h-glycero-v-manno-, 277, 278, 310, 320 Heptulose, D-altro-, 286 1,7-diphosphate, 240-248, 255 7-phosphate, 241-245, 247 —, o-manno 286 Heptulosonic acid, 3-deoxy-, 251 —, 3-deoxy-D-am5t o-, determination of, 252... 

D-erythro-Pentulose 5-phosphate (XLIV) has been formed by the action of transketolase on hydroxypyruvate (XLII) and D-glycerose 3-phosphate, the hydroxypyruvate being decarboxylated196 to active glycolaldehyde which then reacts with the triose phosphate by an acyloin reaction.28 The active glycolaldehyde is also formed from L-glycero-tetrulose, d-altro-heptulose 7-phosphate, D-fructose 6-phosphate, and D-i/ireo-pentulose 5-phosphate and it reacts with various aldehydes (acceptors) to give ketoses.198, 200 Thus, substitution of L-gfh/cero-tetrulose for hydroxypyruvate in the above experiment also resulted in formation of D-en/i/iro-pentulose... 

B) Heptoses and heptuloses D-Sedo(altro)heptulose 30, D-manno-heptulose 33, D-glycero-D-guloheptose 8, D-glucoheptulose 20, L-gluco-heptulose 8, L-galactoheptulose 40. 

It has previously been mentioned that brief treatment of the bacterial extracts with activated carbon abolished their ability to convert D-altro-heptulose 1,7-diphosphate to 5-dehydroquinate, whereas the conversion of enolpyruvate phosphate and n-erythrose 4-phosphate to this intermediate was unaffected. However, by using larger proportions of activated carbon, for longer periods of time, extracts were produced which could still carry out the condensation between enolpyruvate phosphate and D-erythrose 4-phosphate, but could not convert 3-deoxy-D-aro5fno-heptulosonic acid... 

Oxidation of D-glycero-D-altro-heptitol by Acetobacter suboxydans gives d-talo-heptulose, which has been crystallized.263... 

A. Gray, T. Okuda, K. Konishi, Isolation and structure of coriose, a natural 3-heptulose, Chem. Commun., (1968) 553-554 T. Okuda. and K. Konishi, The formation of several products from the trimethylsilylation of D-altro-3-heptulose ("coriose ), Chem. Commun., (1969) 1117-1118 T. Okuda and K. Konishi, Coriose and related compounds. I. Isolation of coriose and co-occuring carbohydrates from leaf, stem, and fruit of Coriaria japonic, Yakugaku Zacchi, 88 (1968) 1329-1332 T. Okuda and K. Konishi, Structure and some reactions of coriose, Tetrahedron, 24 (1968) 6907-6912. 

D-Sedoheptulose, D-altro-2-heptulose a monosaccharide from Sedum (stonecrop), Af, 210.19, m.p. (monohydrate) 102 °C. The 7-phosphate is an intermediate of carbohydrate metabolism (see, e.g. Pentose phosphate cycle) aldolase reactions of sedoheptu-lose 7-phosphate give rise to D-erythrose 4-phosphate, which is a precursor in Aromatic biosynthesis (see). 

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