Calcium 2-keto-D-gluconate

CgHgOr Ca-SHjO Calcium /3-D-arafoino-hexulosonate trihydrate (calcium 2-keto-D-gluconate trihydrate)10 P2i2i2i Z = 4 Dx = 1.743 R = 0.094 for 2,235 intensities (film measurements). There are two symmetry-independent, pyranoid molecules having very similar, distorted 5 conformations. The ring tor-... 

Another method of preparing keto aldonic acids, those of the 2-keto type, is by oxidation of the corresponding osone. Neuberg and Kitasato obtained 18 g. of calcium 2-keto-D-gluconate from 20 g. of the osone by the action of bromine at 20 . Similarly, 2-keto-n-galactonic and 2-keto-maltobionic acids were prepared by Kitasato. The substances were characterized generally as the brucine salts because of the amorphous nature of the calcium salts. 

Figure 8 The co-ordination shells of calcium in (a) calcium D-glucarate tetrahydrate and (b) calcium 2-keto-D-gluconate trihydrate...

H2ftBr2CaOi2f a,a-Trehalose calcium bromide monohydrate, 40B, 397 2H2ftCaOi7, Calcium 2-keto-D-gluconate trihydrate, 42B, 322 2H2 4010 f 4-0- -D-Galactopyranosyl-L-rhamnitol, 43B, 546 Gentiobiose, 45B, 469... 

Calcium D-galactonate, I, 70 Calcium D-gluconate, III, 141, 142, 149, 152, 155, 156, 161 IV, 331 Calcium hypochlorite, III, 165 Calcium 2-keto-D-gIuconate, III, 148, 155 Calcium 5-keto-D-gluconate, III, 156 Calcium lactobionate, calcium bromide double salt, III, 155 Calcium Ievulinate, IV, 311 Calcium maltobionate, III, 161 Calcium D-mannonate, III, 152 Calcium pectate, I, 334 Calcium D-rhamnonate, III, 144 Calcium salts, in preparation of aldonic acids with NaCN, I, 23 Calcium vicianobionate, III, 154 Calcium D-xylonate, III, 155 Camphor, optically active, formed from inactive (racemic) camphor carboxylic acid in the presence of quinine, quinidine or nicotine, V, 53 Camphor carboxylic acid. See Camphor. Camphor, 3-hydroxy-, IV, 89 Camphorquinone, phytochemical reduction of, IV, 89... 

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