ABSTRACT
@#To develop new synthetic process of ceftriaxone sodium, 7-amino-3-［(2, 5-dihydro-6-hydroxy-2-methyl-5-oxo-1, 2, 4-triazin-3-yl)thiomethyl］-3-cephem-4-carboxylic acid(7-ACT)was synthesized from 7-aminocephalosporanicacid(7-ACA)by reaction with 2, 5-dihydro-6-hydroxy-2-methyl-3-mercapto-5-oxo-1, 2, 4-triazine(TTZ)under the catalysis of BF3/C2H3N. Ceftriaxone was prepared from 7-ACT by condensation with 2-(2-amino-4-thiazolyl)-2-methoxyiminoacetic thiobenzothiazole ester(AE)using triethylamine as catalyst. After removing the by-product 2-mercaptobenzothiazole(M)through filtration, the filtrate was treated with sodium acetate to give ceftriaxone sodium. This improved process eliminates the working procedure for separating compound M from the mother liquor, and has the advantages of less solvent consumption and convenient operation, and has been successfully used in commercial production.
ABSTRACT
Objective To approach the correlation between the bone density measured by quantitative CT and the blood sugar level of the aged patients with non-insulin-dependent diabetes mellitus,and observe the effects of the blood sugar level on the bone density.Methods The lumbar bone densities and the blood sugar levels of 160 aged patients with non-insulin-dependent diabetes mellitus (hyperglycemia group 80 cases,euglycemia group 80 cases ) and the healthy aged people (80 cases) were detected by quantitative CT and serum biochemical detection; the correlation between the blood sugar level and the bone density and the osteoporosis occurrence status of aged people in various groups were analyzed.Results The bone density in the non-insulin-dependent diabetes and hyperglycemia group was lower than those in normal(control) group and non-insulin-dependent diabetes and euglycemia group (P