Oxalic Acid → HCID 178441403、化合物

反応式

C(=O)([O-])[O-].[Ba+2].[C:6]([OH:11])(=[O:10])[C:7]([OH:9])=[O:8].[CH3:12][CH2:13][CH2:14][CH2:15][CH:16]1[C:51](=[O:52])[O:50][CH:49]([CH:53]([CH:55]([OH:63])[CH2:56][CH2:57][CH2:58][NH:59][C:60]([NH2:62])=[NH:61])[CH3:54])[CH:48]([CH3:64])[CH:47]=[C:46]([CH3:65])[CH2:45][CH2:44][CH2:43][CH2:42][CH:41]([OH:66])[CH2:40][CH:39]([OH:67])[CH2:38][CH:37]([OH:68])[CH2:36][CH:35]([OH:69])[CH2:34][CH:33]([OH:70])[CH:32]([O:71][C@H:72]2[O:76][C@H:75]([CH2:77][OH:78])[C@@H:74]([OH:79])[C@@H:73]2[OH:80])[CH:31]=[C:30]([CH3:81])[CH:29]([OH:82])[CH2:28][CH2:27][CH2:26][CH:25]([OH:83])[CH2:24][CH2:23][CH2:22][CH:21]([OH:84])[CH2:20][CH2:19][CH:18]([CH3:85])[CH:17]1[OH:86].S([O-])([O-])(=O)=O>CO>[CH3:12][CH2:13][CH2:14][CH2:15][CH:16]1[C:51](=[O:52])[O:50][CH:49]([CH:53]([CH:55]([OH:63])[CH2:56][CH2:57][CH2:58][NH:59][C:60]([NH2:62])=[NH:61])[CH3:54])[CH:48]([CH3:64])[CH:47]=[C:46]([CH3:65])[CH2:45][CH2:44][CH2:43][CH2:42][CH:41]([OH:66])[CH2:40][CH:39]([OH:67])[CH2:38][CH:37]([OH:68])[CH2:36][CH:35]([OH:69])[CH2:34][CH:33]([OH:70])[CH:32]([O:71][C@H:72]2[O:76][C@H:75]([CH2:77][OH:78])[C@@H:74]([OH:79])[C@@H:73]2[OH:80])[CH:31]=[C:30]([CH3:81])[CH:29]([OH:82])[CH2:28][CH2:27][CH2:26][CH:25]([OH:83])[CH2:24][CH2:23][CH2:22][CH:21]([OH:84])[CH2:20][CH2:19][CH:18]([CH3:85])[CH:17]1[OH:86].[C:6]([O-:11])(=[O:10])[C:7]([O-:9])=[O:8]

参加物

実験手順

0.087 g (0.444 millimoles) of barium carbonate are suspended in 15 ml of mthanol whereupon 0.04 g (0.444 millimoles) of oxalic acid are added. The suspension thus obtained is heated to boiling until all the solid is dissolved (about 10 minutes). The solvent is removed in vacuo. The residue is added to a solution of 1.0 g (0.887 millimoles) of primycin sulfate and 80 ml of methanol and the reaction mixture is heated to boiling for 20 minutes under constant stirring. The precipitated barium sulfate is filtered hot over Celite. The filtrate is evaporated in vacuo. The solid residue is treated with ether and filtered. The solid is washed on the filter with a 2:1 mixture of acetone and water. Thus 0.93 g of white primycin oxalate is obtained, yield 92.2%. Mp.: 186°-187° C., /α/D25 =+40°.