反应详情

(2.69 mmole) of 2-(3-thienyl)malonic acid (British Pat. No. 1,125,557) with 645 mg. (2.69 mmole) of 6-amino-2,2-dimethyl-3-(5-tetrazolyl)penam, according to the procedure of Example CXLVII, affords 810 mg. (67% yield) of 6-(2-carboxy-2-[3-thienyl]acetamido)-2,2-dimethyl-3-(5-tetrazolyl)penam as its disodium salt. The infrared spectrum of the product KBr disc) shows absorptions at 1775 cm-1 (β-lactam), 1670 cm-1 (amide I), 1620 cm-1 (carboxylate) and 1525 cm-1 (amide II). The NMR spectrum (D2O) shows absorptions at 7.80-7.00 ppm (multiplet, thienyl hydrogens), 5.88 ppm (doublet, C-6 hydrogen), 5.65 ppm (doublet of doublets, C-5 hydrogen), 5.40 ppm (doublet, C-3 hydrogen), 1.60 ppm (doublet, C-2 methyl hydrogens) and 1.00 ppm (doublet, C-2 methyl hydrogens).

1. customaffords 810 mg